Hey, i have a 1000W digital nextgen hps/mh ballast and a hood reflector. I recently had to change grow rooms and cant be using a 1000w due to space/heat/ventilation. Is it possible to use a 400w or 600w in the digital ballast? Without complications that could lead to a fire....preferably id rather not buy a new ballast either since these were pretty expensive. If the only downfall is a shorter bulb life so be it. Any info appreciated.