cfl vs hps

  1. LEDRF

    Why HPS over CFL?

    Are there benefits one way or the other? Let's find out. First, keep in mind the rule of inverse square law. The lumes you read for say a 400 watt HPS at 50,000 is only for the first foot, because lumes is the foot power of a candle. Every foot after the first gets weaker by 1/4th. So if the...