The Daylight Reflector is specifically designed for use with the Daylight 315 Digital Ballast and the Philips 315w CDM Bulb, it is available in single lamp or double lamp versions.

Philips daylight CDM lamps are extremely efficient ceramic metal halide lamps with a spectral output close to natural sunlight.
As a result, plants form more lateral branches, have smaller internodal spacing, more flowering sites and larger root systems, culminating in strong, healthy growth and high quality yields.