I have two of these bulbs and they both have about 2/3 of an inch of water in them. They are mounted as suggested, tipped downward at a 30+ degree angle, in a weatherproof fixture. (Note: my weatherproof fixture protects water from accessing the base of the bulb via a nice thick closed cell foam seal like most outdoor PAR38 fixtures. It does not protect the glass itself from exposure to the elements.)
They seem to still be working (so far) although the portion of reflective coating in contact with water has dissolved.
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My house has over 2 dozen downlights, and I've been slowly replacing the incandescent bulbs with LED PAR38 bulbs, LED retrofits, and CFLs. These lights are a good compromise right now (late 2012) for work areas like kitchens. The LED retrofit lights don't have the same brightness (lumens) as these, at least not the low-cost ones in the orange big box stores. The Philips LED PAR38 bulbs look really nice (the color temperature is not cold, though it isn't quite as warm as incandescents) and are bright enough, but they are a *lot* more expensive than these and use almost as much power.After trying and ditching (for now) LEDs in my kitchen, I put these lights in. They use about half the power as the old incandescent bulbs they replaced. They don't cost much. They should last a 3-4 times longer than the incandescents. The main drawback is that they are dim when first turned on, and brighten pretty slowly. You don't want these in a place where you'll be turning the lights on and off repeatedly--like a hallway--or a place where you want light instantly--like an entryway. I think, though, that they are nice and bright and work well in the kitchen, where we tend to leave the lights on most of the day.
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The bulbs are good in that they do not take long to heat up and give the maximum light like other types. However, I ordered four and only two arrived that were useable. The others were broken. 4 stars for the bulb itself. Maybe a better choice to get these at a store than get broken ones and incur a loss.Honest reviews on Philips 408922 Energy Saver Compact Fluorescent 23-Watt PAR38
One bulb is shining outside my window. It takes awhile to get bright, as is typical of CFLs, but so far so good. The bulb has not yet experienced the depths of a midwestern winter, which will be the true test for me of its longevity. The other bulb flickered the first time I turned it on, then died. When I checked it, the bulb inside was broken. (These are essentially spiral style CFLs encased in a more traditional outdoor flood, so it is like a filament breaking; unless you are specifically looking for it, you don't really know it is broken until you try to turn it on.) So, it is not clear to me whether it arrived broken due to shipping or if it broke on first switch, which would be a manufacturing defect. It did not get installed in the first 30 days after I received it, as it was going 25 feet in the air and I don't love ladders, so returning it was not an option.Find helpful customer reviews and review ratings for Philips 408922 Energy Saver Compact Fluorescent 23-Watt PAR38
So slow to turn on they're practically pointless. I had to replace them almost immediately. Terribly slow to turn on.
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