What a Crock, Sorrry I feel old enough to talk this way when I can't get competent help (never shop Home Depot)any way have a dusk to dawn light that we want to put a yellow or amber light in and can't get them to work. the original bulb ( Phillips ) has been working for 8!!!years. My daughter put in a 100w 120V bug light and it blows overnite. We have called Phillips, Lowes, Home Depot, local hardware etc. no help! It's apparent we will have to have an electrician come and replace fixture. Does anyone have a possible answer, we thought about just painting globe. Thanx,

There are Dusk to Dawn lights that use Mercury Vapor bulbs, Sodium Vapor, Flourscent bulbs, and incandensent.

If the old bulb has lasted 8 years then it is not an incandenscent.

Light is ouside garage,lost paperwork that came with light, it was installed by an Electrician 8 or 9 years ago. We looked at bulb that is inserted and it has 100w 120v(made by Philips) and some other wording it is an ordinary looking light bulb execpt it is larger than regular 100w bulbs. There is a switch on the garage wall to enable turning off and on, we live in a very rural area and want to help nearby observatory with amber lights as well as ourselves. Thanks, msmaddog.

Do the bulbs look like these?

If so they can't be replaced with an incandenscent bulb.

An indcandenscent bulb of the same wattage would give much less light.

There are new light fixtures designed to minimize light scatter. I think that the program is called Dark Skies or something like that.

You might want to work with the observatory in selecting a fixture and someone there might be able to put it up for you.

Here is one, but it is equivalent to a 100 watt incandenscent. And I think that existing one is probably equivalent to about 300-400 watts. But the way that it scatters the light you might be only getting 1/2 of that light.