option 2 looks good, however it will leave some darker areas on the ends of the tank. I am using 2 48" fixtures on 2-40breeder tanks that are close together on a 125 stand. I ended up buying a custom 4 bulb 24" fixture to cover the unlit 2 ft. section of the tank. Works very well. My 48" fixtures are 3 bulb that I bought at Home Depot for $34 a piece. LOTS of light!!