Hello there I am looking for some advice on wether if i bought a 600w hps grow light kit could i replace the 600w bulb with a 250w bulb but still continue to use the 600w ballast? Or would this damage the light and ballast? Just its 20quid cheaper to get a 600w kit on ebay than the cheapest 250w one i have already. Thank you for reading and I hope someone can help.