I hate to beat a dead horse, but I need everyones educated opinions. My tank is a 58
gal. Oceanic show. It is 36" long and 20" deep. I will have a 2"-3" deep sand bed cutting the depth to 17-18".
I was set on doing 2-175w magnetic and ready to order when the thought hit me

Why not go with a single
ELECTRONIC 250w? More efficient, can run any bulb, and when I upgrade to a larger tank (everyone does eventually) I'll already be one step ahead of the game.
My only concern is the rule of thumb of one bulb per 2' of tank length. Am I going to end up with dark areas on the ends of my tank? Is a single 250 enough for a 58
gal? I was going to go with a 12 or 14K bulb to eliminate the need for actinics.
Thanks in advance!