Ceramic metal halogen lamps (CMH) are the latest craze among high pressure steam lamps in the growing business. They shine intensely in the full light spectrum and are particularly close to natural sunlight. As a result, particularly compact and dense flowers grow among them. With their 600 watts, they consume about a quarter less energy than other high-pressure steam lamps. The 600W CMH 3K version is especially geared towards the flowering phase of the plants, but is also suitable for growth phases.
The ratio of grams / watt is significantly better with CMH lamps: with HPS lights you can not always easily get 1: 1 (1 gram yield per 1 watt energy consumption), but with CMHs are 1.5 g / W or even 1.8 g / W relatively easy to achieve
Technical specifications
Full spectrum
Suitable for the growth and flowering phase
Light intensity: 60 608 lumens
Color temperature: 3000 Kelvin
Photon flux (PPF): 1011.4 µmol / sec
Safe double glazing
Version: E40
more info here