I have been experimenting with foil, and it definitely does help over-heating! Haven't had any problems, either. You jus need to experiment with how much to use. I began with a 4-fold thickness square of aluminum foil, placed right on top of the bulb. Now, I've got it down to where a single layer square of foil is what my 52oz LL lamp seems to need to keep from running hot. Try it!