VIVOSUN T5 Grow Light Bulbs 4Ft 46 Inches, 54W 6500K HO Light Bulbs, 5-Pack

So much brighter! I had to replace 3 bulbs that weren't holding up anymore. Installed and WOW really made a difference. I only have one of the older bulbs and you can see how much brighter these bulbs are along side it. I will update my review to show how long these bulbs last and how bright they will be in the months to come. Two years from purchase and only two bulbs are holding up, not bad for 24hrs x 730 days, 17520 hrs and I’m sure they would last even longer if I use a timer for a few hours of off time.

This is my second tube of lights. I have used them for years now and my plants thrive and grow quite tall. I have a variety of plants under this light: a couple of pomegranate bushes that bloom every year, an 8’ cactus that continues to put out new sections, multiple aloe vera with thick leaves, etc. They fit my light perfectly and last a long time. I recommend these for indoor plants.

UPDATE (September, 2017): Both of the Vivosun bulbs that I actually received in working order have completely stopped working. Not just dim, but dark. They didn't even last 6 months. I have had them on 14-16 hours a day over the summer, less in the winter. Stay away. I strongly recommend you spend a little more for the Aquatic Life Hydroponic Bulbs, 54-Watt T5 HO 6,500K Cool White Grow (4-Pack) Made in Germany . Barring one instance of shipping damage, the Aquatic Life bulbs arrived in good shape and are still going strong after 6 months. They are also brighter and have a more blue light. (All the bulbs are in the same fixture, by the way.) ORIGINAL REVIEW (March, 2017): The bulbs were packaged in a strong cardboard tube that seemed to have survived shipping. There were five paper sleeves that should each have had a bulb but only 2 bulbs! There were shards of what seemed like one more bulb that was broken. Where were the other two? Perhaps in dust at the bottom--I did not want to dig through the shards--but it appeared that only 3 were shipped. The two that arrived seem to be in good working order and much brighter than the 1-year old bulbs they replaced. And receiving two out of five in working order is an improvement: I ordered four more expensive, special spectrum bulbs at the same time all all arrived broken Aquatic Life Hydroponic Bulbs, 54-Watt T5 HO 6,500K Cool White Grow (4-Pack) Made in Germany (but at least there were clearly 4 bulbs shipped). UPDATE 3/26/17: I reordered the Aquatic Life bulbs and all arrived intact. They were actually much better packaged than the VIVISUN bulbs They were packaged by Aquatic Life, not Amazon, and it was clear that the damage in my first order of Aquatic Life bulbs was due to rough handling by UPS. In contrast, the VIVOSUN bulbs were poorly packaged by Amazon. Once installed, the Aquatic Life bulbs were clearly much brighter and bluer than the VIVOSUN bulbs--even though both are supposed to be 6500K. The Aquatic Life bulbs are clearly higher quality--worth the extra expense.

Have used for several years. High intensity lights for starting garden plants and flowers. Work great

The closest yet to the real sun. Yet, all baby plants go outside on the first sunny day, and I bring them in to warm their feet at night. The Grow lights give me a six-week jump start on the garden.

I seem to loose a couple of bulbs each summer while the fixture is in storage.

Light bulbs work great

I use these in one of a few different T5 hanging lamps - either 2-bulb, 4-bulb, or 8-bulb. The application is for sprouting seeds in a nursery environment (like a small 'grow tent'). These are the bulbs I like for any germination, they work awesome. The spectrum seems to be spot on. Honestly, I do not use the 8-Bulb lamp because I used LEDs once out of the nursery.

Decided to give this a try due to local prices just going up and up, nothing to lose I thought. Bought, it arrived quite quickly, threw them into my T5HO fixtures and watched the plants. In a few short days the plant responded to the new bulb and it 6500K spectrum. They are appropriately packaged within their own cardboard tube. Long story short, I'd recommend this to anyone looking for a T5HO grow bulb. Specs that I had measured...lux and PAR at 12", 24" and 36". lux - 12" ( 480 lux ), 24" ( 156 lux ), 36" ( 78 lux ) par - 12" ( 14.2 PAR ), 24" ( 7.0 PAR ), 36" ( 2.2 PAR ) My readings compared against manufactured specs equate fine and I'm happy with my results. wattage runs true at 20 watts per bulb My opinion on these T5HO tubes are that they are good for spectrum as they do grow plant well. To get the most out of the light, I'd suggest to have in the 6" - 12" distance range between light fixture and top of plant. Ideally a bank of 2 - 4 bulbs are best in any T5HO light setup so that each plant leaf is given the appropriate amount of light spread. Personally I use these in a bank of 4 bulbs to get the light spread at a distance of roughly 10" from plant top. An honest review

Excellent, I can't stress enough how well these were packaged to prevent damage, very well done. The quality is great and the work fantastic for my indoor plant grow stand. I mixed 6500k with 3000k with these and found amazing results.

Great items with great price!!!

i bought 60 of them 2 months ago , at the start they were supper bright , but slowly it started loosing it brightness, now most of them burnt and wont emit any light, had to take them all down and find a replacement, not worth buying for.

This is the second set of lights I have bought from this company. The first was a couple years ago and they worked great lasted thousands of hours. This time 2/5 have lasted a few hundred hours and don’t work.