Seems like a fire hazard to me, but I have the same thing going on. I have hay bales stacked up around my larger palms to form an enclosure, along with 60 watt bulbs inside. I figure I've only had the lights running for 3 nigths this year, so there's not too much of a risk.

Good call islandbreeze, I think i'll put xmas lights in for round the clock heat and use the spotlight for bad nights like the next couple ones.

I'm surprised teens would damage leaves,how warm did it get in there?would be worth it to invest in a thermometer with remote sensor,(if you don't already have one)my T.fortunei have seen temps as low as 12F with no damage,x-mas lights need to be well insulated to provide much warmth let us all know how it works out.p.s I layed a thermometer on some rope lights(indoors,they were rapped up like a garden hose about a foot in diameter,18 footer they warmed to 95F) but did not raise the temp of my single walled umbrella greenhouse much if any.