GrowFAQ:

How safe are these MH and HPS lights?

  Added by: Tick    Viewed: 622 times  Rated by 9 users: 5.00/10
Many people have used these lights in their homes with no problems what so ever for thousands of hours. Good safety measures (Murphy's Law) are to have smoke alarms inside and just outside of your grow area. Especially if your grow area is in your basement have a smoke alarm positioned so you will be able to hear it from the upstairs bedroom.
  Last modified: 19:33 - Jan 24, 2001 

faq:725 "How safe are these MH and HPS lights?"