ebay ~$30 for a pair of 2 inch diameter round LED ~6500K color, 15 watts - puts out light equal to 150 watt Halogen bulb
Very low demand on the charging system- requires approx 3 amps to run both on Full.
Shipped from San Diego instead of waiting on China.
The round clear lens units have 3 modes- low power for DRL- daytime running lights, Full power, and rapid FLASH-
which does a really nice job moving slow traffic out of the way
Oncoming traffic thru the mountains is very alert to my presence... from a long distance.