LED lights have come a long way in the past 5 years. There are some now that are quite bright. I replaced 50W halogen spreader lights on my boat with 18W LEDs, and the LEDs are much brighter. I've also purchased some "60Watt" equal CREE LED lamps for household use--put three in a ceiling fan. They are every bit as bright as the 60W bulbs they replaced. Now, the $9 ea. price tag is hard to swallow, but they are supposed to last 30 years.
To the OP--if you are looking for bright lights for working at night, I'd look at the marine spreader lights. You can find cheap ones on ebay that might work OK for a while, but folks I know that bought them, discovered they are neither waterproof nor "marine grade." Good quality LED spreader lights might cost $100 each or more.
coastalnightlights.com is one well regarded seller.
http://www.coastalnightlights.com/st...spreaders.html