For CFL is;

2700K = 0.38gr/Watt (proven estimate from www.smartlight.nl)

2100K = 0.50gr/Watt (proven estimate from www.smartlight.nl)

2100/2700K (mixed) = 0.46gr/Watt (proven estimate from www.smartlight.nl)

HPS lights = 0.60gr/Watt (proven estimate from www.smartlight.nl)

Induction lights = 0.8gr/Watt (proven estimate from www.smartlight.nl)


(all tests shown on that site were under the same conditions at the same time, with clones from the same mother)



Induction lights are really fucking expencive so I'll use HPS

(picture = 200W induction light)