Rated 4.4 out of 5 by 14
Rated 5.0 out of 5.0 by Diesel Very bright bulbs
These bulbs are awesome! I use them in my garage so I can do work even in the middle of the night. They create more than enough light
September 10, 2015
Rated 4.0 out of 5.0 by LiveAndLetLive These are good T5 HO replacement tubes
T5 HO tubes at 6500 Kelvin burn at the blue (bright daylight) end of the spectrum. Great for initial growth and getting started. They put out a lot of light (up to 5,000 lumens) for the electricity used (it is lumens, not watts that the plants respond to). Yes, they are smaller than reg fluorescent tubes and require their own fixture. DUH! They give off very little heat and can be placed within an inch or so of the canopy without heat burn. 3000 Kelvin tubes are at the warm end of the spectrum and are better for wrapping up/blooming stage. A mix of both works well once the plant has established a good root system, sturdy stalks/stems, and are ready to flower. Begin with 6500K, then switch to a mix of 3 & 6.5 Kelvins, then when the plant is winding down, switch to all 3000 Kelvins. That mimics the beginning of summer, middle of summer, and the approach of fall (to the plant). These bulbs are average grade and good enough. There is a lumen drop over time but at this price you can exchange them twice as often, keeping your plants receiving closer to the 5K lumens per tube they start out at. Pretty darn good. The other reviewer's issue was not with the tube, it was with the FO (faulty operator). I grow very rare orchids in a lab and have learned over time T5 HO is more than sufficient to get a great job done. These tubes are cost effective (IMHO) and do the job.
May 23, 2012
Rated 5.0 out of 5.0 by Butch Great shop light
Makes my shop bright as day time. There are no shadows and my eyes do not get as tired.
January 8, 2013
Rated 5.0 out of 5.0 by RARA 4 ft. T5 865 High Output (6500K) Fluorescent Grow Light Replacement Bulb
ITS VERY BRIGHT AND SMALL LOOK NICE FOR A WHOLESALE
June 16, 2015
Rated 5.0 out of 5.0 by dapa Very Satisfied
Used in twin light fixture for plant seedlings. It has produced heavy stems when kept within 2-3 inchs of plants.
April 14, 2015
Rated 5.0 out of 5.0 by BeginnerGardener Great light for the value - and growing plants
I had issues getting the lights to withstand shipping when I ordered them elsewhere. I was very impressed with the sturdiness of the packaging. All my lights made it without issue or damage.
June 24, 2014
Rated 5.0 out of 5.0 by broschultz Sturdy
Would you believe this bulb fell 4 ft onto a concrete floor and still works? It did!
March 18, 2014
Rated 5.0 out of 5.0 by 2000hdxl12c great product
bulbs work great, if you don't understand what you are buying, you will need a t5 fixture as well, they are different from t8 and t12
December 13, 2013