I know what you mean Jam, I just got 3 of the 150w and they are huge! Like 5" in diameter. I have to rig something to my reflectors to keep them from dangling they are so big & heavy.

I probably could have gotten away with the 105's but wanted to have mad light on them for flowering. Plus the 150's are 2700k, a little better spectrum I think.
doco Reviewed by doco on . Does this light fit into a normal socket? 105w CFLs 2700k warm white :) http://www.eurobatteries.com/sitepages/description4.asp?id=59&cat=Florescent%20Compact :cool: Rating: 5