Pretty impressive heat sink, huh? For an obsolete Pentium desk top. Note the fan -- brushless. Ball bearings...the size makes it a real single hand full.
Well I ordered 80 of them a few years ago. Impossible to find other types of heatsinks with this btu capacity at anywhere near the price.
Now, take a SHARP brand chip. Maybe the best color rendition of anything I have yet seen. Just a noodge on the yellow side of white. Almost not discernible.
50 watt rated chip. Driven at proper current which is around 35.3 volts when warm.
Lumen output is impressive -- not quite National Lampoon Christmas at the Griswold's, but too bright for residential. The chip belongs 10 feet in the air and the incredible 160 degree dispersion is a real area lighter upper.
Even with a pound of extruded finned aluminum without the fan the temperature will rise and the chip will fail within hours. Not guesswork here.
Those glass face floodlamps -- the case is painted unfinned aluminum. And they use 50 and even 100 watt chips. Do they last? Wait. This gets better. The chips these guys use are garbage. Absolutely dry and clean between the chip and the aluminum housing. No heat sink compound -- still more! The chip mounting screws are almost 100% stripped. I had to fix these by the dozens -- sharp chips, scrape off the paint, drill through holes and re-tap the threads. New screws, and silver based heat sink compound. Wait! What about the heat sink size? Oh. That. Well you see, when the geniuses realized their cobbled together nightmares were catching fire, they backed off on the amperage. Way WAY back. A fifty watt chip being driven at 30 watts. Good and fine if you want thirty watts of light.
So,
When you decide to shop for Panda Soy Honorable Dragon Kite LED lights, I recommend a person first buy this...
Insert some under the tongue. Then start reading the "manufacturer's specifications".
The constant current drivers are of no better quality. Capacitors hate 180+ Degree environments. Careful, don't burn your fingers...
