What would happen if you put a 400watt HPS bulb into a socket that was connected to a 400watt MH ballast? Beuler? Anyone?
KnowledgeIsPower Reviewed by KnowledgeIsPower on . HPS and MH lighting - Tips and info, optimal distance from tops! This is basically like a mini guide and crash course on HPS and MH lighting, benefits of each, differences to other types of lighting, and most importantly knowing the proper distance between the bulbs and your plants - regardless of heat! Some basic things to know, what is MH/HPS?: - MH: Metal Halide - HPS: High Pressure Sodium MH and HPS are far superior lighting alternatives to the sun over any other type of lighting known to man. Some people suggest that you should accommodate Rating: 5