L LOHAS LED 100W Chip Cool White Bulb High Power Energy Saving Lamp Chip

Rated for 100w, only 50w led chip, dont bother

This is an awesome little chip. It is extremely bright - everyone who has seen it has been blown away with the amount of light. It floods my backyard much better than halogen floodlights. It outshines the highbeams on my car. It makes a 250 W halogen work light look like it's not even on. It's also very inexpensive for what you get. That said, there is more hardware required to run this light properly. You need a power supply that can deliver 100+ Watts. I'm currently using a computer power supply with 300 W available on the 12 V rail. You need a way to step up the power supply voltage to the LED operating voltage. I'm using a boost converter rated for 150 W made by DROK, also from Amazon. The output voltage can be controlled very easily by adjusting a trim pot. I have pulled up to 142 W (at 37 V) from this device. At that power level, the heatsinks do get hot (60 °C vs 28 °C ambient) but it does recommend the use of a fan at power levels above 100 W. You need a way to cool the LED. The LED does not come with any heatsink. At high power levels it will quickly fry itself. Even though LEDs are efficient compared to other light sources, most of the input energy is wasted at heat. I have mine attached with thermal grease to an old AMD processor stock heatsink/fan that is designed for a 125 W processor. With the fan running and pushing 120 W through this chip, the temperature of the chip remains below 40 °C. Optionally, you need a lens to focus the light. I got one right here on Amazon that takes the normally 140° cone of light of the bare chip and brings it down to 60°, increasing the luminous intensity by a factor of 5. Both focused and unfocused, the light is very uniform, and works very well as a flood light. Also optionally, you need a driver to control the output. If you run the LED straight from the boost converter it will be at full brightness all of the time. If that is all you require, then no driver is necessary. I built an Ardunio powered circuit that offers more control. It uses a low side N-channel MOSFET to switch the LED. If I want to dim the LED, the Arduino switches the FET at 490 Hz and varies the duty cycle to change the brightness. 0-100% brightness is available. Another mode keeps the duty cycle constant at 50%, but varies the frequency from 1 to 100 Hz, creating a powerful strobe light. In either mode (dimming or strobe) the duty cycle or frequency is controlled by a potentiometer. I am planning on adding a momentary switch that immediately puts the LED at full brightness, as well a temperature sensor that turns on the heatsink fan when it gets hot. If you want this to be a standalone unit and not a jumble of wires, you will need an enclosure to mount everything and keep it cool. I'm planning on making mine able to run from AC from the wall, or a battery pack. This is not a plug and play device. It needs more hardware and assembly to get it running optimally. Once it is running though, it is very impressive.

Estos modulos son exelentes para un diseño económico y muy interesantes, su aplicación es muy amplia y muy fácil de diseñar

Worst product.

Very bright, need to monitor current for initial checks, running them at 28-31 vdc. Definitely need lots of heat sink. Really compact using them to illuminate electronics testing bench. Watch the price, first batch cost me $11.73 each, next ones I found for $1.73 each.