LED or HPS SON-T for your pitch?

For years, stadium grow lights used HPS SON-T lamps: the orange high-pressure sodium lamps many groundsmen know well. Today, LED has taken over. This article explains the differences and what they mean for your pitch and your energy bill.
More light from every kWh

Two grow lights with the same wattage can give very different results on the grass. The difference is in the LEDs themselves, how they are cooled and how they are controlled. This article explains what makes an efficient grow light.