High power ultraviolet LED experiments 

Some experiments to see how a selection of series capacitors affects the power dissipation and output of a 50W near-ultraviolet LED.
The small motor-run capacitors look very promising for reducing the heat dissipation and extending the LED lifespan of these LED modules. Be aware that these capacitors do not have discharge resistors and can deliver a zing, so a couple of 470K resistors in series across the capacitor is a good idea to drop the voltage fairly quickly.
With standard LED floodlights the capacitors could either be mounted internally, or in an external box. This could be an interesting way to prolong the life of external security lights.
All tests were done with a 240V supply. For 120V use the capacitor values will have to be higher.
I Have no way to test the wavelength accuracy.
The gloves I wore in the video are standard half-dipped work gloves. They are not officially rated for live electrical work, but do provide a secondary layer of protection against shock at mains voltage. If working in a wet or outdoor environment take extra safety precautions.
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