MH bulbs (lamps) - CFL bulbs (lamps) - HPS bulbs - CMH bulbs
CFL bulbs are energy saving bulbs and are suitable for plants in the vegetative and flowering phase. They are more suitable for smaller spaces.
HPS (High Pressure Sodium) bulbs are suitable for plants in the vegetative and flowering phase. HPS Lights emit white light.
CMH (ceramic metal halide - also LEC or CMD) bulbs are suitable for plants in the vegetative and flowering phase. CMH lamps produce the most sun-like spectrum of light.