PROTOPIA CMH 315W 3000K Grow Light Bulb37000Lumens,Richest Spectrum on The Market with a CRI of 90,Great for Commercial Applications

I have no idea where people come up with the numbers for the CMH lamps, but my plants can tell me. Along the bottom portion of all my plants have turned yellow and leaves are falling off due to lack of light from this weak 315w CMH lamp. I switched from 400w MH to 315w CMH after 1 week finding that my branches have stretched so tall they have ruined the plants. The stems and branches have also gotten smaller and weaker as they have stretched so long. Using this CMH lamp made the plants act as if they were in shade and needed to stretch up to the light. If you do not want to ruin your plants then do not switch from MH to CMH lamps. CMH lamps do not come close to the efficiency of image lamps. The stems and branches of my plants have stretched four or five times greater a distance between internodal spacing just in one week's time of using 315w CMH lamp with a Growers Choice 315w CMH ballast. I am extremely disappointed what this CMH lamp has done to my plants, and would not recommend anyone switch from MH to CMH lamps. I have achieved much closer internodal spacing with MH lamps and even CFLs then this 315w CMH lamp! I have removed the CMH lamp permanently and I'm sticking with MH lamps for closer internodal spacing, thicker stronger branches, thicker darker leaves, and healthier plant all around.

came in one piece and works as expected . being a delicate item you worry, but mine got here and is doing its job. just use normal precautions when you install it. (screw it in) best not to let your hands touch it ,oil can cause hot spots on the bulb and cause the bulb to possibly fail (possibly ill say again) just good practice with these type of bulbs. its only happened to me once and it was not this product ,just a high pressure light i was installing along time ago.i started wearing gloves and have never had it happen agin

The Protopia Metal Halide bulb was a trial to see how well it works compared to a few I have used in the past. I was looking for a 600 watt MH bulb with a concentration for vegetative growth. I have to admit, for the price, the performance was not too bad. I will purchase this one again.

best light out... Philips,grower choice, any BULB that cost over 50.00 your a fool... be wise.. YOUTUBE these.. I got money.. and im a keep my money... but I'm a spend it wisely... all my cmh bulbs are PROTOPIA..

Runs hot. Super bright white. No good in small spaces, as it needs to be hung alot farther away from canopy to not cause damage. Good for supplemental UV blast late in flower. HORIZONTAL USE ONLY so says a hidden flap on the inside of the box.Will burn you if you spend time under this light. Long sleeves and uv shades REQUIRED. Felt sunburnt after 10 minutes.

Very well made product we'll buy again

very brite light and very warm and does wonders on my plants

This bulb is great I have been using it to veg for 1 and a half years now. Thinking about getting a fresh one at this point. I use a galaxy ballast I'm sure people that are having issues are using cheapo ballasts