Since LEDs advance pretty quickly, shopping by wattage can get different brightnesses and light spreads. If you can compare LEDs on lumens + angle or compare them on candlepower you'll get a better idea of how bright they are.
I used these 70-lumen, 1.5W LEDs from SuperBrightLeds. They worked as marker lights, but I decided that little dots can look like big circles that are far away.
I rode a bit with this fellow and liked the lights. It's the only picture I have of these lights turned on.
They are the Rigid spot lights, 1,500 or so lumens each at 5W each. They are heavy though, 1.5# each. I bought them directly from Rigid and one of mine came without the internal lens. It took a few weeks and a few calls to get a correct light. Then the brackets they sell with them broke -- the first one before I even got off smooth gravel. With the weight and the need for a sturdy bracket I probably wouldn't choose these again even if they were a decent company.
I have one spot and one flood. (The picture is two spots.) The light from the Rigids is the only thing I like about them.
Last edited by Grinnin; 02-07-2014 at 08:58 AM.