One more note about using an "enclosure" to assure the foam is not touching the lights - if you are mixing lights like I did (Lots of orange, some red and some purple), you can layout your strings so that you have the mix of colors you want in a single [wiffle ball / water bottle bottom / etc]. Try tying some together with twist ties or hot gluing their bases together like I did. The result, after applying the foam, will yield sort of a blurry mixture of the colors coming from a single spot. With the program controller for the lights changing the rythm and pluse, each grouping looks like a live ember pulsing in its different heat ranges. Hope this is clearly expressed.