Seen "Phantom of the Opera"? If so, you know all about heavy light fixtures. If you haven't, all you need to know is installing a ceiling light fixture that's too heavy can be an enlightening experience because electric ceiling boxes in most homes are not designed to carry much weight. Ten or 15 pounds is OK. If the metal electric box is attached directly to a solid framing member, it can handle about 25 pounds. If you're going for the crystal-chandelier-in-the-grand-ballroom look, you could be hanging 50, 75 or even 100 or more pounds of gear overhead from an electric box designed for much less weight. If you don't want to be wearing your new chandelier, find out how much it weighs first, and if it's much heavier than a standard fixture, install special brackets and ceiling attachments to handle the extra weight. Or buy a lighter fixture. And that's the On The House tip for today.