Light-emitting plasma (LEP) and white lasers are also making waves. LEDs suffer from narrow beam and canopy penetration, which can be compensated using a rail s

Light-emitting plasma (LEP) and white lasers are also making waves. LEDs suffer from narrow beam and canopy penetration, which can be compensated using a rail system. See: http://plantozoid.com/plasma-grow-light-revolution/ http://plantozoid.com/plasma-grow-light-revolution/