Some months ago, I fitted 2 of these 18 watt 9 Epistar leds from Malaysia to my SSDR aircraft (similar to Part 103)....
18W Bright Motorcycle 6 LED Fog White Headlight Spot Light Durable 12-80V | eBay
75mm diameter, very light weight because of the cheap and nasty ugly pressed ali housing/heat sink, rubbish mounting bracket etc.... but about 2,300 lumen light output each, and unlike many other led lamps they do not cause rfi.
Need to modify the rubbish mounting bracket etc but at only $4 each plus postage... worth a punt, ,or the leds and lens unit could easily be modified and fitted to a better housing
Any idea on the weight of this light?