Verify manually VA supply versus lumen output. The chips are sold in China. They are advertised as 10-watt. If they are driven at `12.00 volts they consume NINETEEN WATTS. 19.00 va.
When heat-sinked correctly to a 90 mm star shaped heatsink (round with rays) the temperature of the chip rises to 90c in two minutes and accelerating temp rise time. The heat sink measures 70c. This spells fast and certain doom for that chip.
Less than 12.00 volts is required. I -could- use a constant current LED power supply for a 10 watt chip but the driver will not fit behind the heat sink. There is not that much room above the lamp.
The chips are immeasurably brighter than common LED retrofit bulbs.
They are also pure white. Absolutely no blue or yellow no matter what angle they are viewed from. Their beam spread is also around 140 degrees of angle.
10 watts at 10 volts over-drives a 1.5 amp rated LM7809 ? I guess an ampere isn't an ampere.
Guess I'd better wait for the power supply. And LT 783 7.5 ampere voltage regulators. They need a circuit board. Meaning they cannot be mounted next to the lamp. The wiring in between is going to act like a transmitting antenna for the device switching.
Such is life.
