Grow light HPS and MH 250 Watt
Sylvania Groxpress 250 Watt
The Sylvania 250 Watt Grolux is a high-pressure sodium super lamp optimizing the red/blue output of the light spectrum essential for plant growth.
The Philips Master Son-t Pia Plus 250 Watt is a 'high pressure sodium' bulb for the flowering stage of your plants.
The Phillips MH Master HPI-T Plus 250 Watt is a 'metal halide' bulb for the vegetable stage of your plants.
HPS lamps are for the flowering period, MH lamps have more red light in the light spectrum and are for the growth period of the plants. You need a reflector with an E27 fitting for these lamps, and a ballast (ballast).