Depends on how old they are and what they are looking for. the really old ones were white lights under coloured plastic. now they are coloured lights or LED's under clear plastic.
Chris (formerly R@nSiD)
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When the power of love overcomes the love of power the world will truely know peace - Jimmy Hendrix
Winner SM VFX Challenge 1
3rd Place SM SteamPunk Challenge (May 2007)