1. Since 1983, all mercury lamps have been required to have a shut-off fail safe in the event the bulb glass enclosure is broken.

2. Grow lights radiate heat. Not flame. Unless they came into contact with something that is immediately ignitable, most likely all it will do is a slow burn, or a fast melt of something that would come into contact with it.

3. Exhausting the heated air negates the minimal threat of spontaneous combustion.

4. Remove things out of the area that might up and jump+ into the light and cause a fire.

5. The ignition point of the lumber in your walls is well above the temps that a 1000 watt mh (the hottest grow bulb) is able to produce. As in, put the bulb directly into contact with wood and all it will do is burn it via heat transfer...the carbon in the wood needs to reach 765°F before it will ignite into flame.

6. Gypsum drywall is non-combustionable.

7. Long before anything structural in your area would be able to catch fire...you would notice something like paint browning or blistering.

8. With everything on and running, leave your place for several hours...you'll come back to find that your home is still intact. Do it for a whole day, day after day...you'll get confident that no problems from fire will be an issue.

9. That shit you're smoking is magnifying your concern into paranoa. So don't design or fabricate anything for your space while you're stoned.

10. I like fresh chocalate chip cookies.