  on my yahoo i saw an article entitled, "Toxic Metal Found At Uranium Plant. " to which i thought, "you mean, other than the uranium? " haha... haven't actually read the article though. now that i've read it, they were talking about the beryllium found in aluminum blades.
chronic beryllium exposure essentially turns your lungs into scar tissue and then gives you lung cancer, so it's quite a dangerous chemical. interestingly, they discovered the hazardous effects of beryllium in the 1940s when fluorescent lighting really took off because early fluorescent lights used beryllium and those people involved in the manufacture of the lights all developed some sort of reaction to the beryllium. but need not worry about your lights now... 
