Most .. or rather a majority of grow room fires are caused by a HID light FALLING.

Make sure your ballast is grounded and use a 15-20 amp breaker. Aside from the danger of the light falling and the bulb breaking there aren't many "dangers" involving HID.

Make sure your light is secure!!!

Create a good amount of heat though, and that could be dangerous... for your plants.
BobBong Reviewed by BobBong on . HID Dangers? I was wondering if there was any danger associated with an HID bulb bursting and no one being around to see it or know about it for a few hours. What are the chances it could cause a fire? Rating: 5