I also use styrene for florescent light fixtures. Depending on the sizes of the cages, you will or won't need to cut it. There's also several different types of it, white or clear, but either way, they can't see through clearly. The clear type is similar to a shower door, and they won't be able to see their reflection. It's pretty flimsy stuff so be careful with it until it's in place, and dig through the pile of it at the store, because about 50 percent of the ones I dug through had broken corners on them.
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Tyler Stewart
Las Vegas NV
www.BLUEBEASTREPTILE.com