The blast light lens depends on what you’re blasting and what material you’re blasting and the rebound that directly get back at you. But on average, typically you can usually get two to one. Again it is depending on what you’re blasting cause it could be possible to tear off more. The power for the light is a 12v power supply or a diesel screw compressor and we use the alligator clips on the 12v battery and then jump back into the light that way.