HID, Metal Halide, HPS

High intensity discharge lights were the most common lighting solutions amoungst indoor cannabis growers for a long time, along with their metal halide and high pressure sodium variations. These grow lights can closely achieve the light output of the sun, but they use more power, generate a lot of heat, and the bulbs need to be changed at different grow stages. 

Learn more:
- Do different lights affect buds differently?
- How to calculate light energy needs for HIDS
- What is the different between metal halide and HPS?   

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