4K 315W CMH
Grow Lights315W
The Grower's Choice 4K 315W CMH is the vegetative lamp in the pair: a single-ended ceramic metal halide bulb at 4200K, 535 µmol/s of PAR, a CRI of 97 and a rated life of 10,000 Hours.
It trades a little PAR against the warmer lamp in the pair for a much higher CRI — 97 is close to daylight — and a cooler colour. Like its sibling it is a bulb only, and needs a 315W CMH ballast and reflector.
The usual way to run these is one of each: 4200K through veg, then the warmer lamp for flower, same fixture. At 10,000 Hours rated life a lamp run through veg cycles only will last a good while before output drops off.