When do I change lightbulbs from Metal Halide to High Pressure Sodium?
- I am currently growing clones that are about 3-4 weeks along
They are currently on 18 on - 6 off under 800 total wattage (2 400 watt bulbs) rectangular closet sized grow space (6 1/2 feet long, 7 1/2 feet high, 2 feet...