Wattage being equal and heat issues aside......Metal halide for vegging is the best. HPS is best for flowering. All lighting has its issues.....with HID the trade off is heat.
Weedhound Reviewed by Weedhound on . Which types of lights are best for growing marijuana? Hey i wonder which one of these types of lights are best for growing marijuana? HPS and Metal Halide? Halogen and Fluorescent? NIMH and Incandescent? Rating: 5