Philips Son-T Agro Lamp Specialised bulb for your vegetative growth! The Philips Son-T Agro lamp features a spectrum output that is specifically optimised for plant growth. A 30% increase in the spectrum's blue content (added Xenon) provides more leafy, vegetative development - larger harvests of higher quality plants. Philips Son-T Agro Lamp Features; Technical Specifications for the Philips SON-T Plus and 600w The outer tubular bulb is clear. Appropriate for the blossoming stage For a long and dependable lifetime, use a ceramic discharge tube with a Philips Integrated Antenna (PIA). Lamps that are completely lead-free This is a good environmental option because of its high energy efficiency and lack of lead (Pb). This is the most energy efficient HPS lamp due to its high luminous efficacy. How to use Philips Son-T Agro Lamp; Mounting this lamp is very straightforward and fast. Holding the lamp with a clean towel, screw it into the reflector's bulb-holder fitting until it is tight. Check that it is securely screwed into the holder. Connect the ballast to the reflector cable. Before turning on the lamp, make sure it is fully clean and free of debris, grease, and fingerprints. Turn on the ballast at the wall. To maintain the optimal growth, replace the lamp every 9 months.