minimum space for a 250W

[Mark]

Hey Ron, what would be the minimum amount of space for a 250W MH Hydrofarm sunburst light with a self-contained ballast, so that I don't start a fire? Heh, what a horrible thought! I guess I'm looking for the space needed surrounding the light from one wall, the ceiling, and the closet door. The min/max distance from the plants would be helpful too. Thanx for all your advice and info. Mark