it would be close to the same both would use a little more than 250 watts in power, the only real difference would be the efficiency between the 2 types of lighting.
if you intend to use the lighting to flower plants with the hps would be the best choice.
bejay Reviewed by bejay on . light watt question does the same amount of watts used by different types of light cost the same so like 250 of cfls cost same as 250 hps?? Rating: 5