If you are in doubt it's advisable to throw them out! The materials can consist of tin, wood, metal, and mirror.
Check with your broker to make sure that you have the right set along. And purchasing wanted the Daylight Blue bulb pick a Kelvin rated bulb of 5000K-6500K. http://E-Hp.info/mitsuike/4-bbs/bbs/m-123y.cgi?id=1&post=1&&comment=000587