i'm planning on shooting a lot of exteriors in the woods in the middle of nowhere, with hmi's and daylight kino's. all i have for power is a 5000 watt coleman gas powered generator. i know hmi ballasts have a pretty low tolerance for voltage drops, and that a bad generator can even hurt or blow an hmi ballast. has anyone had experience with this? i've heard there are "voltage regulators" you can buy for this sort of thing, does anyone have any info. on those?