LOL don't go wiring any lights to cell chargers man - the lights require 120v if you're in the US and CFLs have built in ballasts, which means the light itself takes care of how much power it needs.

Save the cell charger for powering any PC fans you may have laying around or can get - you can easily wire the fans to run off a cell charger, or any wall adaptor for that matter (as long as the adaptor's rating is = to or less than the fan's voltage rating). PC fans make excellent exhaust fans for grow's like yours.

if you can't find a vanity light fitting just grab some "Y Bulb Adaptors" - they're like $2ea and allow you to connect 2 CFLs into one lamp holder.