Roger – I just installed some exterior LED lighting on my trailer – I do not know how they compare to a 500W work light, but the leds I installed were CREE 2200LU/6W in a flood pattern – the light they provide is incredible – almost too bright!
Roger – not sure if you’re an eBay shopper, but try doing a search in eBay for CREE flood light – there are many. You migth be able to find online retailers from there. Allot of these are being used by the offroad guys – you can get light bars that are literally 6′ long. I purchased a set of 7″ lights which turned out to be more than enough.