Classic Romaine. When you think hydroponics, the first vegetable that comes to mind is probably lettuce. It flourishes under growth chamber conditions. Once established, your hydroponic lettuce plants should get between 10 and 14 hours of light per day. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. My hydroponic lettuce has really taken off. - neydroydrec Dec 14, 2016 at 3:32 This post contains affiliate links. Heading lettuce takes longer to finish but can be done in about 45 days. Step 3: Add 300 grams of Epsom salt. Normally you fill the container at the start and when the water runs out the grow is done. Lettuces don't need a lot of light to grow. Watch giraffes eat our delicious hydroponic lettuce! You can determine the power of light using a PAR meter or the manufacturers recommendations. Why is this sentence from The Great Gatsby grammatical? Fourteen to 16 hours of sunlight is ideal. Preparing a Vegetable Garden Site. Plants grown under lights indoors need more hours of light than the same plants do outdoors. They send nutrients up to the plant. As an Amazon Associate I earn from qualifying purchases. How much light do hydroponics strawberries need? The cheapest way to do it is wire your own panel using keyless lamp holders and bulk buying the CFL's. However, when grown meticulously, hydroponic lettuce can have a better flavor than lettuce grown with any other method. She is a former Clemson University Extension Agent. At the same time, lettuce needs plenty of potassium for structure and to prevent wilting. It all starts with quality seeds. I recommend using hydroponic nutrients to feed your lettuce plants. Outdoors, the lettuce can be placed in a sunny spot in the garden or on a patio. Here are some symptoms you may be seeing and their probable causes: Burned or wilted leaves: not enough calcium in your nutrient solution, Premature bolting: temperatures in the greenhouse are too warm, Limp leaves: too much or too little water, too much heat, too little light, or a fungal infection. If you want a continuous harvest you should start more plants every few weeks. Allow for at least 14 to 16 hours of artificial light, followed by 10 to 12 hours of darkness every day for annuals. Approximately 80-100k will be adequate. Naturally, lettuces develop leaves incredibly quickly, but putting them in hydroponic systems is like super-charging them. Lettuce growth depends on the interactions of blue and green light, but it is not clear how phosphor-converted broad spectra, with or without supplemental blue and red light, influence crop growth and quality. This is because nitrogen stimulates foliar growth or leaf growth. The pH range for seedlings should be adjusted to 6.4 and as your plant matures, the pH should be adjusted to 6.0. This is the most expensive element of the lighting system, so it must be kept off the ground to ensure that it never gets wet in case of a flood or leak. 4.
A Guide To Growing Hydroponic Lettuce At Home - Climatebiz It is there to support the plants and block light coming through into the reservoir.
How To Grow Hydroponic Lettuce - Hydrobuilder Learning Center If you're growing lettuce in a sunny window, make sure to rotate the plants regularly so all sides receive equal exposure to the light. Do new devs get fired if they can't solve a certain bug? There are a few problems that could harm your hydroponic lettuce crops. Thanks to products like Lettuce Grow's Farmstand, even those without a lot of outdoor space can easily and conveniently grow produce at home. Nearly any type of lettuce can grow well in a hydroponic environment, but some of the most popular varieties are romaine, red and green oak leaf, and butterleaf. Eight hours is the minimal quantity of daylight required for strong leaf growth, according to a trial study conducted in 2019 at Ohio State University. Check out TrueLeaf Market for 20+ varieties of lettuce seeds, Greenway Biotech 1 Pound Lettuce Fertilizer (8-15-36 ) Plus Trace Minerals, MASTERBLEND 4-18-38 Complete Combo Kit Fertilizer Bulk (2.5lb Kit), When Does Primrose Die? Perennials require a stricter calculation for the lighting schedule to bring the plants through the vegetative (growth) and flowering (production) stages. You dont need to worry about having the perfect, optimum light cycle, just one that keeps your plants healthy. This is a popular variety for baby leaf production. They are cheap and easy. I found some for only 6 USD in my local store here in Berlin. Another reason your lettuce is bitter is because of nitrogen deficiency. I have had excellent indoor results with two T5 fluorescent tubes per 8 heads. 25 Best Plants for Stem Cuttings | Multiply Your Collection! That said, its still essential to understand the proper conditions for optimal growth. Start your seeds in jiffy pellets or starter plugs. If you do some research you may be able to find the manufacturers data sheets for certain lights, which may include this information, although you may have to contact the manufacturer for more in depth answers. Hydroponic lettuce may taste different based on the nutrients you provide it, the temperature, and several other factors, but in general, For new growers, the easiest and most effective option is to get a, premade dry mix of nutrients specially designed for lettuce. How many hours of light does hydroponic lettuce need? How much water do these hydroponic office plants need? Double check the pH level of your system approximately 15 to 30 minutes after adding nutrients. Connect and share knowledge within a single location that is structured and easy to search. Use 1, 23W CFL (100W equalivant), 6500K bulb per plant. Buttercrunch will make loose heads while with leaf lettuce you can pick individual leaves off for a more continuous harvest. So I guess it is in a class of its own. It can be totally passive and doesnt need electricity to work. Christina has experience in hydroponic gardening methods. Some types of Butterhead lettuce are dark green or red. A good nutrient mix for lettuce is, for every 5 gallons of water, 2 teaspoons of 18-15-36 NPK organic fertilizer and then 2 teaspoons of calcium nitrate and 1 teaspoon of magnesium sulphate of you want to make your own. The duration in which the head of your lettuce plant ripens will depend on the variety. So it will keep growing and provide multiple harvests. The best answers are voted up and rise to the top, Not the answer you're looking for? As soon as you start growing lettuce, you should use fluorescent grow lights to illuminate it. Light is measured by DLI or daily light integral. Lettuce Grow sends . So for this reason, most growers go for fluorescent lighting. Monitor the pH and temperature of the solution and adjust as needed. If you wanted to grow tomatoes in this system you would need to grow them in a trash can. This isn't really an answer, but have you considered running small-scale experiments? Artificial lighting for a hydroponic garden should imitate the direct and indirect sunlight requirements for outdoor gardening.
Small-scale hydroponics | UMN Extension We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. My current LED lights are 2:1 ratio of 3000K/5000K running dual meanwell 100 watt drivers with a real Watt draw at kill-a-watt of 209Watt, produce at 9.5 inches from canopy 295 ppfd @ 12 hrs a DLI of 12.7 and not that it has any cross correlation to plant because it refers to visible light 16300 lux meter/sq ( SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time ) and not all light plants use is visible, hence the difference in the unit of measurement to judge light for plants. This is simply because the lettuce may have been handled by someone with unclean hands. "High humidity favors powdery mildew and Botrytis," he said. Cookies collect information about your preferences and your devices and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. The information here is general and may not pertain to every variety of hydroponic lettuce. Most people dont taste any difference at all. Most light providers don't even know about PAR though, unless they are specialized in photosynthetic light. and these are converted to DLI Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range) that are delivered to a specific area over a 24-hour period. So, for example 6 ml of each per gallon would make a gallon of 600 ppm nutrient solution. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The consent submitted will only be used for data processing originating from this website. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. A laser temperature gun can help determine if the intensity is resulting in too much heat. Is a lighting system required for hydroponic gardening? The reason why lumens are a bad indicator for determining light requirements of plants is that the light plants need most is almost out of the visible spectrum for humans. The ballast is a power box that powers the light. For most varieties, this means a daytime temperature of around 50F to 75F. For most types, youll want to only cut the outer leaves each time you harvest, allowing the core and roots to remain and continue growing. But with so many types of lettuce available, how do you pick just one (or even just a few)? Are you thinking about growing hydroponic lettuce indoors? An example of data being processed may be a unique identifier stored in a cookie. How many hours of light does hydroponic lettuce need? Lettuce is a fast growing plant. Gardening & Landscaping Stack Exchange is a question and answer site for gardeners and landscapers. Remember, lettuce is an incredibly easy plant to grow hydroponically. But I found a workaround. A fertilizer high in nitrogen and potassium will work best. Ideal for lighting a defined area such as a flat or many small pots. This light is full of energy and impacts leaf growth that we know as vegetative' or veg' growth.'. During summer, lettuce does not grow that fast, but it does grow.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'growertoday_com-medrectangle-4','ezslot_1',106,'0','0'])};__ez_fad_position('div-gpt-ad-growertoday_com-medrectangle-4-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'growertoday_com-medrectangle-4','ezslot_2',106,'0','1'])};__ez_fad_position('div-gpt-ad-growertoday_com-medrectangle-4-0_1');.medrectangle-4-multi-106{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}, Lettuce does not require much light. If you're going to grow lettuce, consider Bok Choy too. Hydroponic strawberries need at least 8 - 12 hours of direct sunlight daily. The Kratky method uses no pumps or airstones. They are not the most common you will find. But eventually, over time the plant will go to seed or become bitter. That's inaccurate. Some popular choices include lettuce, tomatoes, and herbs. Manual timers use pins and have two plugs on either side so that you can attach two grow lights at once. You do not want light getting in the reservoir. Usually, it takes about 3 weeks for the first edible leaf to emerge and about 45 to 85 days to get the full head harvest. Check out TrueLeaf Market for 20+ varieties of lettuce seeds! How much lightning is needed for water spinach and celery? You will get a crop sooner this way. Lettuce, for example, prefers a range high in blue light. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The morning lettuce will taste sweet and the heat-burdened afternoon lettuce will taste bitter. Incidentally using a CFL light is a great way to start seeds. The good news is that hydroponic lettuce, since it typically doesnt have to travel long distances to get to the consumer, tends to last quite a bit longer than most soil-grown lettuces. Lettuce has low light requirements and they are fast-growing. .
PH For Hydroponic Lettuce - Grower Today Anything else lettuce might grow but it will be elongated and not form proper lettuce heads. Budget: A total of 306.72 kWh of energy was used growing lettuce hydroponically with 48 LED lighting fixtures on for 18 hours each day.
Don't Make These 12 Common Seed Starting MistakesWhat To Do Instead I have metal halide lights indoors and the lettuces that I plant underneath them flower and go bitter in about 8 weeks - hardly worth the effort. I am beginning to get into indoor hydroponics to grow lettuce, I haven't figured out which type of lettuce to grow yet, I am thinking of a butterhead. Lettuce plants grown in hydroponics are fast and easy to maintain. When harvesting this way, you may also want to dispose of some of the leaves near the plants base if they arent as crisp as the rest. I have been to many hydroponics stores and seen almost all the lettuce hydroponics videos on youtube. How Much Light Is Needed for Hydroponic Lettuce? Discard the bulbs after 6 months or less, as the spectrum of light your plants need will decrease. If you see signs of burn on your leaves, you can lower the number of hours of lighting per day. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'growertoday_com-large-leaderboard-2','ezslot_12',114,'0','0'])};__ez_fad_position('div-gpt-ad-growertoday_com-large-leaderboard-2-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'growertoday_com-large-leaderboard-2','ezslot_13',114,'0','1'])};__ez_fad_position('div-gpt-ad-growertoday_com-large-leaderboard-2-0_1');.large-leaderboard-2-multi-114{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}. They produce fruit no matter the level of light exposure. Just like most plants, lettuce benefits from a slight temperature drop at night, with an ideal night time temperature being between 40F to 60F. With lettuce hydroponics, it's best to germinate your seeds in an egg carton or similar environment, filling the spaces with the growing medium you prefer. The high temperature will cause your lettuce plant to bolt or go into the flowering phase. So I am growing my hydroponic lettuce in a 10 gallon tote but you can use one smaller or larger. I added the wicks to move water up to the pots as the water level drops.
How Much Light Does Lettuce Need To Grow Indoors? The arugula is still young, and I haven't tried lettuce, yet (although I may try some Merlot lettuce soon); so I'll have to update in a while. Once they sprout you can thin them out or leave them until they get a bit bigger for an early salad. Since theyre delicious and versatile, theyre also perfect for your hydroponic farm. Source: Rural Living Lettuce requires roughly 10-12 hours of light per day.
How Many Watts Does Lettuce Need? - Sweetish Hill Read our. It doesnt have to be dark. This also allows me to grow a larger, slower maturing plant as long as I keep it topped up. Bought 11 right away. So its not simple thing pop a couple bulbs out throw a lumen number at them and say ok plants will grow, yes maybe they will grow but not at the best or optimum for the plant. Leafy greens, and lettuce especially, are perfectly suited for hydroponic systems. Yes! This pH range is acidic enough to reduce the activities of algae and at this pH range, plants can absorb nutrients adequately for their growth. "cool white" (more "blue") lights tend to be more beneficial for vegetative growth, while "warm white" (more "red") helps flowering growth, I believe, so if you get a shop light, get the cool white bulbs for this. Each type of bulb has pluses and minuses depending on your level of investment in hydroponics and growing needs. I have had success with an 80 watt compact fluorescent light (CFL) within 5 cm of the plants, you can grow at least 6 plants. A 100W plant light (we'll assume 100% efficiency for math purposes) could be producing only 4000 lumens, while a 100W human light would be 68300 lumens. I added wicks to each pot. Eunice takes great pride in her garden and often shares the fruits of her labor with friends and family.
Hydroponic Tomatoes 101 - Your Complete Growing Guide - WhyFarmIt.com i wouldnt swap out my led for any t5 cfl or metal halide out there for power ppfd/watt light efficiency. To be most effective, each light should be a specific distance from the plants: Fluorescent lights should be 3 to 12 inches above the tops of the plants; HID s, 24 to 60 inches; and LED s, 12 to 24 inches. You can grow just about anything in a hydroponic greenhouse, but it's important to choose plants that will do well in water. This is called a lettuce raft. Building a hydroponic system for lettuce is a fun and rewarding project. Standard grow lights include fluorescent, LED and HID lamps.
THESE Are the Nutrients Your Hydroponic Lettuce Needs - WhyFarmIt.com How to Grow Hydroponic Lettuce (with Pictures) - wikiHow Its measured in units called micromoles (mols) for light wavelength that is usable by your plant. University of New Hampshire Extension. If you arent controlling the temperature that your lettuce is grown in, you need to work with the sun or accept the occasional bitter head of lettuce. To get the best out of your hydroponic lettuce, it is best if you grow it in a medium with a PH value of 5.5 to about 6.5. Hydroponic lettuce offers a variety of types and flavors, suitable for nearly any palette. All plants have different light spectrum requirements. It is cheap and easy to set up. All hydroponic lighting systems have four main parts: the bulb, reflector hood, remote ballast, and timer. Mix well. What sort of strategies would a medieval military use against a fantasy giant?
How to Grow Hydroponic Lettuce: Plant Care Tips - Treehugger Its an incredibly versatile leaf with plenty of uses, and a hydroponic environment is a perfect setting to ward off contaminants. How long does lettuce take to grow hydroponically? As long as the plants share similar nutritional needs, they can be grown in the same container or from the same reservoir. You will need to decide how many pots you want and trace them out. Leaf lettuce is probably best. Congrats! The most common types of bulbs are LED, fluorescent, metal halide (MH), and high-pressure sodium (HPS). It is also important to monitor the plants as they grow. The most important thing about the lights is that you must get 6400 Kelvin (+/- 300) wavelength lights. Water is heavy, about 8 pounds per gallon. There isnt anything tricky or fancy about growing lettuce, and you can get started with almost no experience and very little money. I am, however, keeping the lights on longer than others here with their brighter lights (only giving about five hours' darkness or less). Youll also need a water pump, tubing, and timer. Think of it like filling a jug of water. This package includes a 4-18-38 Tomato and Vegetable Formula, 15.5-0-0 calcium nitrate fertilizer, and Epsom salt. A 40w tube light is definitely not enough either. Harvest can be incredibly simple if youre not concerned about regrowing your lettuce from the same root system. Asking for help, clarification, or responding to other answers. I will show you how to grow lettuce indoors. How to Change the Ballast on a Fluorescent Light Fixture, The 11 Best Indoor Garden Systems of 2023, 5 Different Fluorescent Tube Sizes and How to Choose One. Ideally, hydroponic tomatoes should receive eight hours of natural light a day or closer to sixteen hours of artificial light (since it won't be as intense). Outside, a vegetable garden requires around eight hours of direct sun per day. All hydro lighting systems have four main parts: the bulb, reflector hood, remote ballast, and timer.
Hydroponic Lettuce Light Requirements - Grower Today Bibb and Boston lettuce are both types of Butterhead lettuce. How To Keep Cut Flowers Fresh Without Water: Full Guide. They can be found in your local hardwa re store if you're lucky. Grow greens, herbs, vegetables and fruit all year long A head of lettuce will keep producing under these conditions for many weeks until it ultimately starts to bolt. All rights reserved. Making statements based on opinion; back them up with references or personal experience. In a bottle combine yeast sugar and water make a hole in the cap, connect a pipe from the bottle to a glass of water make sure the pipe connected to the bottle is air tight. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates. Since its up to 95% water, it can have a hydrating effect, and its vitamin A is good for the eyes. Growing lettuce needs full sun exposure for at least 6 h per day. The size of the grow light you need for two plants will depend on the plants specific needs. How Much Light Does Hydroponic Lettuce Need? Fletcher, I guess you meant 400 to 450nm wavelength for Lettuce? At the same time, hydroponic lettuce systems can be scaled and monetized incredibly well. This way, you can extend your yields and get great value out of each plant. Good things to grow alongside lettuce are spinach, kale, basil, mint, swiss chard, endive, escarole, arugula, watercress, and more. Low humidity affects calcium uptake, which affects photosynthesis and fruit quality. Depending on your setup and bulb type, you may need to reduce the amount of light you give your plants. 7 Expert Tips For Beginners, Growing Coconut Trees In Containers: 7 Tips And Tricks For Beginners, Cardboard Palm Care Indoors: Easy 9 Step Complete Care Guide. Growing conditions for hydroponics - Vanilla Planfolia and Saffron (Crocus Sativus), Lighting for indoor citrus to produce full fruit, How to handle a hobby that makes income in US, Bulk update symbol size units from mm to map units in rule-based symbology, Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). Here, well discuss hydroponic lettuce, its benefits, and how to grow it. This makes it important to maintain ideal temperature ranges when growing lettuce hydroponically. It increases the effectiveness and efficiency of the bulb by reflecting the light down onto the plants at multiple angles, giving a more effective spread. Although you can follow the general guidelines above and have success, some plants do much better with longer or shorter periods of daylight. If you have a mix of these in your garden, you will need to figure out a custom schedule. Theres no question that various varieties of lettuce are excellent choices for hydroponic growers. (Optional) Step 4: Add 1.5 grams of sodium benzoate, a preservative, to help your fertilizer last longer. Soil can expose plants to E. coli and Salmonella, as well as other bacteria, fungi, nematodes, and insects. The main types of hydroponic systems are the DWC, drip irrigation, ebb and flow, Kratky method, NFT, and the wick system. To learn more, see our tips on writing great answers. You should maintain your hydroponic system to ensure your lettuce grows as quickly as possible. Smart Hydroponic Growing System for Indoor Garden,32",7L Hydroponic Garden Kit with LED Grow Light. Fluorescent lighting does not cost much, power consumption is low, and heat production is minimal. The Kratky system is the ideal hydroponic system for beginners. Check the pH levels and make sure they stay between 5.5 and 6.5. Put a few seeds in each planter. When your plant gets old and begins to taste bitter, its time to harvest and plant a new seedling in its place. You will want to set your plants in the net pots and backfill around them with hydroton. Nitrogen levels will determine how tall your plants grow. Learn More About Our Innovative Hydroponic Greenhouses. How to Build a Hydroponic System For Lettuce? Another great thing about lettuce is that it grows well in tandem with other leafy vegetables and herbs. Because of their large, flexible leaves, these plants are an excellent choice for salads, sandwiches, and lettuce wraps.
Complete Guide to Lettuce Hydroponics and What to Buy place this over the iphone front camera lens and use korona to measure light and korona has options to show ppfd - dli - and if curious lux plus can upgrade app to also show kelvin scale. Why does Mister Mxyzptlk need to have a weakness in the comics? That is it! This includes keeping the nutrient. Romaine is one of the most common lettuce varieties used in the United States. Unfold the paper towel to check on them. The plants dont really grow much in this. The amount and strength of this light determine the taste of your lettuce leaf. Hydroponics Basics: 16 Beginner Questions Answered, Hydroponic Nutrients and Fertilizers 101 (Which Is Best?). If you have the technical ability to rotate the system, you should do it. Step 2: Add 600 grams of Masterblend 4-18-38 Tomato & Vegetable Formula. Contact our team to learn more about how Eden Green farming partnerships can elevate your brand and add customer value to your store. How to use Slater Type Orbitals as a basis functions in matrix method correctly? But I decided to hot rod it a bit by adding airstones. In general, most hydroponic leafy greens offer 11-13 harvests per year with the right greenhouse conditions. For most leafy greens use a red:blue ratio of 5:2, this will be sufficient to promote good growth. So lets look at some of the hydroponic lettuce light requirements.Advertisement.medrectangle-3{text-align:center;padding-top:20px!important;padding-bottom:20px!important;padding-left:0!important;padding-right:0!important;background-color:#eee!important;outline:1px solid #dfdfdf;min-height:335px!important}if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'growertoday_com-medrectangle-3','ezslot_3',105,'0','0'])};__ez_fad_position('div-gpt-ad-growertoday_com-medrectangle-3-0');.medrectangle-3{text-align:center;padding-top:20px!important;padding-bottom:20px!important;padding-left:0!important;padding-right:0!important;background-color:#eee!important;outline:1px solid #dfdfdf;min-height:335px!important}if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'growertoday_com-medrectangle-3','ezslot_4',105,'0','1'])};__ez_fad_position('div-gpt-ad-growertoday_com-medrectangle-3-0_1');.medrectangle-3-multi-105{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding-bottom:20px!important;padding-top:20px!important;text-align:center!important}. If you try to refill it you would damage the air roots it has developed. Kratky lettuce needs a minimum of 6 hours of sunlight per day, but 8-10 hours is ideal. Eunice is passionate about her hobby and is always eager to share her knowledge and experience with others. Learn more about Stack Overflow the company, and our products. If you've added too much, or too little, consider using a pH adjusting product. Enigma ( Even with all the answers, there doesn't appear to be a mention of recommended lux/lumen for lettuce. We are reader supported. The crop is done when the water is gone. Lettuce seedlings need around 18 hours of light during the day and six hours of darkness overnight to mimic outdoor conditions. Here are the steps you can follow to build your hydroponic system: Several parts determine the efficiency of a grow light. For more advanced growers, the best option is to make a dry fertilizer mix yourself. If you want to think a little bit bigger for your hydroponic garden but don't want to start from scratch, check out The Farmstand, starting at $399 at Lettuce Grow or on Amazon. Arguably perfect for lettuce. I just started growing some arugula indoors (though not hydroponically), using two regular CFLs that weren't advertised as grow lights (probably 22 watt or less, each, and probably 2500k), and the arugula (as well as my other plants around the light seem to be enjoying it, even though they don't grow toward it very fast; there's more to a light than how fast plants grow toward it.