[Pack of 2] 50W Led Chip Full Spectrum Plant Grow Light (380nm-840nm / Driver Free / AC110V / 100 Watt 2Pcs) SMD COB Emitter Diode Components 50 W Bead for DIY Hydroponic Flowers Growing Lamp

Your browser does not support HTML5 video.  These are real grow spectrum lights. They ARE 115 volts ac power. You need no ballast or transformer to hook these up. You just need to solder two wires to the board, attach them to a heatsink ( I used computer processor heatsinks with fan) with with thermal compound and two part epoxy. I hooked them up to a standard ace hardware 1000w dimmer, and guess what? they dim perfectly fine. This is way cheaper than a ballasted setup and far simpler to build ** Edit** Two months run time without issue---- @117 volts I had .6 AMP draw which = 70.2 WATTS! Much higher than they are rated @ 50 watts!! Keep this in mind as you should have no more than 40 watts per sq ft with LED's

Your browser does not support HTML5 video.  Description talks about a driver, dont buy one, sketchy description needs to be updated. Im Waiting on some heatsink compound, these are neat since you don't need a driver to run the led. All you'll need is to solder a plug in cord to the live and neutral spots on the chip. But if you plan on using a fan you'll need a driver, to run it off the same circuit, that way when you switch on the LED the fan kicks on. The best part is these operate past 60 frames so there is no noticeable flickering. Update!! Runs well product works as intended. Some left out specs.. 60-140* F thermal operating temp, M3 mounting screws, 120V fwd voltage .51 amp draw at that voltage. Not Driverless but intergrated driver, avoid damage to the white epoxy areas. Check for improper continuity between backing plate and soldering points, you don't want to ground your heatsink. I highly recommend siliconing the soldering points, to prevent shorts as well as heat shrinking your screw heads. My mint plant is looking less leggy! Weird bar effects are due to brightness and not flickering :) 5|5 recommend.

I waited on my review as seeing/testing is believing or not..I spent hours days and months researching LEDs... I'm an engineer.. I was giving up hope as the cost of LEDs is way out of budget.. Building is also imo...That said I found this product..I believe in this product! I purchased 6 of these. I attached to a large heat sink. I'm using for tomatoes and lettuce.I'm super happy with the results! The cost to buy a driver and leds was taking me WAY out of budget. This does not.I never write reviews, but I will if I think something is good and deserving for it...or on the other end of spectrum,I think someone should run.Give this product a chance I think you'll be super impressed! Just need a large heat sink (quick Google search can help with this) attach and off you go!

I finally got these hooked up and in operation, using a 9" aluminum pie pan for a heatsink with each. They look to be effective and add 100W of illumination to a small tent. These will require soldering skill and equipment to attach power leads and should probably only be used by someone with some electrical safety knowledge. That said, they seem to be a decent bargain. Update: These ran for about a month, then suddenly dropped to barely visible output (no use for growing). As the ambient temperature was now in the low 80s and I was using a 9" pie pan on each as a passive heat sink I presume the failure to be a result of overheating. Oh well, it was just an experiment. Probably should have used a larger mass, finned heat sink with a fan.

Ok well first... its a good product !Second... if you use a heat sink, you MUST GROUND the heat sink !! If not you may end up with the" when you touch the heat sink it lights up a little "So from what i can tell is there is a little bit of current ( leaking ) passing through the back plate of the led to the heat sink... just to make sure you should ground this bishhhh...Id recomend... but 15$ might be a bit steep for accidental electrocution lol.

One died overnight the first use in my greenhouse. It had enough heatsinking for 200W of power management. It was 7 tall of 12" x 2" x 1/8" aluminum plates I put together for a finned heatsink... Tons of aluminum. The chips did not manage current well, as next day they were super dim. Maybe they need passive cooling and fans.

These leds work great, very bright. They do get hot but i used a small cpu heatsink and fan on a 12v power supply to test and they stayed warm but not hot.

These are amazing!Used a couple cpu heatsinks from old computers and some adhesive thermal compound for cooling. Just wish these had 12v DC output, so I could power the CPU fan off then and keep down the clutter.