@nadir35 They are U7 motorcycle headlights, will wire straight up to 10s or 12s batteries with no problem as they have a huge working voltage range.
Installed a switch on my enclosure so i can bend down while riding and flip em on.
Dirt cheap too, think i paid around $30 for the pair.
They are INCREDIBLY bright, brighter than my motorcycles HIDs, and the beam focus in my opinion is optimal for eskate. Sometimes i pick my board up to use as a light bazooka, the beam will light up a hill by my house a half mile away.