Anyone had any experience with these lamps? E27-1W7-RB http://www.quasarled.com/led-grow-light.htm I think they may also be the same as these: http://stores.ebay.com/New-Leaf-LED-Li-Leger-Inc NEW LEAF VII If the link is broken you can find it by doing a Google search for "new leaf 7 Watt High Power LED Grow Light" They claim to have six 660nm (red) LEDs and one 455nm (blue) LED. Each 1 Watt LEDs. I ordered some from Quasar and opened one unit up. All the LEDs are in series and the total current is just above 300mA. BTW the quality and consistency of manufacturing is what you'd expect from mainland China: 1. The cast aluminum body has thin sections where the casting is not great and light shines right thought the back of the lamp in a couple of places. 2. During assembly someone used inconsistant length screws holding the lamp together. 3. The packaging is so bad that some of the lamps I received could not be screwed into a lamp socket as the screw thread was crushed. 4. One of the lamps had a faulty inverter which was overdriving the LEDs (680mA instead of 300ma for the others) 5. The LED lenses are not glass, just plastic and are claimed to have a 30 degree pattern, which is a little too tight, looks like they'd be best to go for 40-60 degree lenses for illuminating a reasonable sized plant. 6. The LEDs are soldered to a printed circuit board and white thermal compound has been put under the LEDs to help with the thermal transfer. However I cannot be sure that the printed circuit board is thermally conductive, it might be, as it is a funny black color, perhaps not regular fiberglass... or maybe just a dark solder mask to throw me off the trail... But in any case application of the thermal compound is inconsistant - some of the lamps had little or no thermal compound under the LEDs, so no doubt those ones will run hotter and have substantially reduced life. The printed circuit board is held in place against the cast aluminum by the force of the lenses pressing down on the LEDs when the cover is screwed in place. The underside of the printed circuit board is generously smeared with thermal compound. The red light is very bright, and seems too bright for 660nm light, I suspect these are not actually 660nm LEDs but perhaps regular ~624nm ones. What I read on Internet was that because 660nm is getting close to the edge of human color perception, an equivalent light intensity to regular red (624nm) will seem a lot dimmer. Apart from roithner-laser's C11A1-660-30 (no doubt very expensive) I am unable to find any manufacturer anywhere claiming to have 1W 660nm LEDs which look remotely similar, which also makes me suspicious. Opening the grow lamps up, I closely inspected the LEDs and found they are a white body LED, flat on the bottom, with flat gold connections emerging from each end. They have a small rectangular pressing in one of the leads to recognize the positive side. They look pretty similar to these ones: http://www.hebeiltd.com.cn/led.datasheet/E12GR2C.pdf I contacted Hebei (the Chinese manufacturer) and they told me they do not have a 1W 660nm LED, only 624nm, and they said they know of no other manufacturer that does have them. Also the blue lamps listed on Hebei's web site are described as Royal Blue 460nm (not 455nm) so if the manufacturer of these grow lamps is using Hebei LEDs then I am dubious about their claim of the light wavelengths. I am tempted to have the wavelength of the light tested to confirm the manufacturer's claim. Has anyone seen these lamps?

I had very good luck with Lowe's Utilitech (made by Feit) Par 38 dimmable LEDs. The color temp is 3000K and it is very good light. We are on a wooded lot and also have mutable colors so finding the right bulbs has not been easy. Our HD does not yet have the Reveal LEDs. It will be interesting to see how those work eventually as there was a coating in the incandescents that kept them from going too candlelight though they were slightly red. I found the Utilitech to have bright and clear white light. But we are in the Northeast and those bulbs can look different in different parts of the country and in concert with the paint color. This lighting tech transition has not made this easy.

Some would prefer to have the same light color i.e. ~ 3000K The following link should provide more info. Here is a link that might be useful: DIY LED UCL continuation

You could always pick a LED light with adjustable temperature. For example this one has 5 settings 2700K to 5000K. I used a few in my shower and they're a piece of cake to install. They also dim nicely. https://www.homedepot.com/p/Halo-HLB-4-in-White-Round-Integrated-LED-Recessed-Light-Direct-Mount-Kit-with-Selectable-CCT-2700K-5000K-No-Can-Needed-HLB4069FS1EMWR/306050711