Classic reflectors - HPS bulbs - CFL bulbs (lamps) - CMH bulbs
HPS (High Pressure Sodium) bulbs are suitable for plants in the vegetative and flowering phase. HPS Lights emit white light.
CFL bulbs are energy saving bulbs and are suitable for plants in the vegetative and flowering phase. They are more suitable for smaller spaces.
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.