GrowLED LED Bypass T8 - LED Grow Light Tube for Garden, Hydroponic, and Greenhouse - 18 Watts - Red/Blue Spectrum, Bypass Ballast Required, Direct Wire, UL Listed, Work Without Ballast, Pack of 4

We have used these T8 Grow Tubes from ThinkLux for 9 months and have returned again and again to purchase 80+ of them as we expand our non-profit's project to grow year-round fresh food for local families. From our experience trying different lighting solutions, these ThinkLux tubes have proven to be the best performing and by far the most cost effective for hydroponic basil, kale, peas, rosemary, strawberries and several varieties of lettuce and salad greens. Growth is fast, lighting is cool and even, power consumption is extremely low, and there's no chance of burning even tiny seedlings. We have a light spectrum analyzer and the actual measured curve of plant-usable red and blue spectrum is exactly as represented on the packaging and product Website. Light output levels are extremely consistent between tubes purchased up to 9 months apart. No drop in light output has been measured over 9 months. We couldn't be more satisfied and plan to use many, many more of these in the future. The latest project pictured is a hydroponic rack fully surrounded with T8 Grow Tubes for growing a dense stand of climbing peas and beans.Updated July 4 2018 - All of our LED tubes are still working wonderfully! Just ordered 24 more for our next indoor garden expansion.

If you are not familiar with wiring and converting a florescent lamp to accept these. Either look for a different product or have someone else do it for you. That being said, they work great and instructions were easy to follow.

received these in good shape. works great but NOT enough lighting power to satisfy the budding stage of your plants. might be good for other types of plants.

I grow Pacific Northwest Native plants. The GrowLEDs work very well for them because they run cool, and the PNW natives need it to be cool. So far, they like the spectrum, too. Plus I have received great support from customer service.

They work as advertised. I have 4 LED tube lights in my office fixture. I put 2 grow tubes in center of light. so I get regular light and grow light for office plants. Works great. and yes we had to re-wire the fixture but it is well worth it. I purchased 60 of the led ( non grow tubes ) for my office. Office is so bright and my electric bill is way down and these should last well over 10 years... very happy with them...

got the product, it took 4 days, and I have Prime, come to find out you have to rewire your fixture, did everything correct, and still don't work.DON'T WASTE YOUR MONEY ON THIS JUNK. MORE CRAP FROM CHINA!!!

I bought 16 of these within the last 8 months. One of the tubes died a month ago. I can't figure out how to get warranty service.There is a contact link on their website, I've tried it almost every day for the last week. When I try, I get "There was an error trying to send your message. Please try again later." There is no phone number that I can find.Color me disappointed. The plants seem to thrive under these tubes, but I'm very concerned about the warranty.

Excellent lighting product. Packaging was great and an easy retrofit for the old florescent light bulbs.