How much heat does a 450 watt hps give off?? I’m growing in a old Michigan basement, and it is On average 50 degrees Fahrenheit during winter. My heating costs are killing me. I’m thinking about changing lights to make up for the cold. I just don’t want to run a light and a heater. Am I doomed to have to wait for warmer temps? Any suggestions?? It breaks my heart to see my room empty.