Is it the kids can see the bulbs from the sides? You can use a coffee can or similar to build a quick par can.
I have wondered about those lights for ages; now I know they look great!Personally, I love these little fluorescent Party Lights. They aren’t too bright, and really give you a lot of vibrant color for around $5 each. Another great thing is they don’t get nearly as warm as spotlights, so your options for light cans is a lot broader.
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I made a little tutorial on how to make some really inexpensive light cans for them. Here's the link: http://www.halloweenforum.com/tutorials-and-step-by-step/139099-cheap-light-cans-build.html
Here's what my yard looks like using only those bulbs.
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Walmart use to sell them, but my two local walmarts have fazed them out, and gone with a little round bulb, which is a little less bright and vibrant, but it's still not bad. Also, Home Depot sells them, but for some reason, the only blue they carry is made by GE, and even though they are very similar in design, the color doesn't compare to the Party Lights brand. I know you can get the Party Lights online, and even a little cheaper than if buying them in stores. I use to use floodlights, but soon realized they're just way too bright, which then washes out everything, and you don't get the cool color effects that you can with other bulbs. Check out the tutorial on making the cheap light cans. Ignore the one lighting my cauldron creep. It needs one more coat of black paint so you won't see the light through the back of it, but I've been so busy with other things, I keep forgetting to walk out there with a can of spray paint. The rest of the ones I made don't have that problem, and they really only took me about twenty minutes to make four of them.
P.S. Okay, I just walked out there with a can of spray paint and took care of that light can...finally!
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