Yupper. Not for optical-type lamps where you need a specular/mirrorlike reflector to form the beam, but the 'headlamps' on a mower are really more like back-up lights on a car. The dude in this movie takes awhile to get to the point, but he eventually (3:24) he starts to get around to it, and the difference is pretty obvious even with a low-quality camera. And he just used regular white, not ceiling white; regular white looks dishwater-grey next to ceiling white.