HPS Lights growing

These HPS grow lights emit a bluish color spectrum and are exclusivley for the growing stage. They lack the red/yellow spectrum necessary for the flowering stage.

HPS Lights Flowering

These HPS grow lights emit a red/yellow color spectrum and are exclusively for the flowering stage. They lack the blueish spectrum necessary for the growing phase.

HPS Lights flowering / growing

These HPS combination bulbs emphasize the yellow/red spectrum for the flowering stage but also have a blue/green spectrum for the growing stage. They may be used for the complete cycle.

CFL Bulbs

CFL light bulbs are probably the successor of the NDL bulbs. Efficient, long-lived and rather inexpensive because they almost always manage without external ballast.

Fluorescent lamp

Fluorescent lamps are efficient and easy to handle. An evergreen.