If any thing that electrical if it falls , thats where the problem starts.
Hot tube , cold tube, cpf, anything thats powered by electricity that falls has a possibility of caussing a fire.
Always use gfi in the grow room, always hang with a good chain, always think safetyfirst, ALWAYS HAVE A FIRE ALARMS , SAFETY FIRST, GROWING SECOND, YOUR LIFE DEPENDS ON IT. enough shouting do not kill you self and outhers.