Philips SON-T Plus Grow Lamps are high quality sodium bulbs that produce more lumens than standard. These SON-T Agro Lamps areDual Spectrum HPS lamps (high pressure sodium) excellent for flowering and perform well for vegetative growth. It produces more blue than most competitors lamps for excellent results in the vegetative stage. 

Philips SON-T Plus comes in 400w and 600w 

Clear tubular outer bulb
Suitable for the flowering stage
Ceramic discharge tube with Philips Integrated Antenna (PIA) for a long and reliable lifetime.
55,000 lumens for 400W Lamp
90.000 lumens for 600W Lamp
Completely lead-free lamps
High energy efficiency and absence of lead (Pb) makes this a sound environmental offer
High luminous efficiciency makes this the most energy efficient HPS lamp

How to use a Philips Son-T Plus Dual Spectrum HPS Lamp

1. 
   Mounting this lamp is very simple and fast.
2. 
   Holding the lamp with a clean cloth and screw it into the E40 bulb-holder fitting of the reflector, until it is tight.
3. 
   Double check it is well screwed into the holder.
4. 
   Connect your reflector cable to the 400W or 600W ballast.
5. 
   Ensure the lamp is completely clean and free of dirt, grease and finger-prints etc. before switching it on.
6. 
   Switch the ballast on at the wall.
7. 
   Replace the lamp after 9 months to maintain the best growth.

Recommended "electronic ballast" for growing with this grow bulb: Digital or Magnetic, 240V or 400V