Speaking of lightbulbs,
check out Bulborama, the online lighting superstore. Personally, we've never thought of buying bulbs online (we're guessing this site's main customers are businesses), but we like that this place has anything you could possibly think of, including an array of energy-saving products. Most interesting to us: the site offers gift certificates
. What a bizarre yet useful gift idea (imagine the look on someone's face when opening this gift certificate...).