Make sure that ballast is on a fire-proof surface. If possible get a cinder block and let it sit on it. And those ballasts are made for that type of thing so no it should'nt blow or cause a fire unless you help it to do so .
orangeman Reviewed by orangeman on . HELP HPS 250 watt ballast Hi, im new to growing, im past the germination stage Im using the light above, but the ballast is very very hot, its only been on for 6 hours, is it normal for it to be this hot? and will it cause me any danger? Thanks Rating: 5