f40 is a T12 4100k ( red spectrum ) and 24618 is the type of ballast used with those bulbs. T12's don't do much. Maybe root clones with them and that's about it. grab a T5 and get some aquarium coral bulbs. thats what I use for veg and flower.
my bulbs for an 8 bulb t5 - 3 UV Lighting Redsun, 3 Korallen Zucht Fiji Purple, 1 Wave Point Coral Wave, 1 ATI 12000k Aquablue Special.
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During flower you want about 60% red spectrum and 40% blue spectrum and during veg the opposite. during flower red will make them stretch and blue will keep them short and the opposite during veg.
Also during veg i switch out a redsun for a UV Lighting 75.25
half the power, no heat, no ventilation, only need a/c when its hot out