Growing Elite Marijuana

Watts

# Of

Lumens

Emitted

# Of

Lumens

Per 100

Watts

Square

Feet

Illuminated

100W
Incandescent 1,750 1,750 N/Applicable
4’ FL (CW-
40W) 2,960 7,400 1-2
8’ FL (CW-
75W) 5,800 7,733 2-4
MH 175W 14,000 8,000 5-10
MH 400W 40,000 10,000 12-20
MH 1000W 125,000 12,500 35-70
HPS 100W 9,500 9,500 3-6
HPS 15OW 16,000 10,600 5-10
HPS 400W 50,000 12,500 15-30
HPS 1000W 140,000 14,000 40-80

Because of the ease and convenience

of operating a HID lamp and their increased

efficiency they are recommended for

lighting indoor gardens.

Gardens should receive between 1000-

3000 lumens per square foot. Of course,

plants in a 3000 lumen garden will grow

faster and flower more profusely than those

under dimmer lights. Successful gardens

usually are lit at between 1500-2500

lumens per square foot. During the

vegetative stage, plants stretch out when

they receive low levels of light. During

flowering the flowers are looser and sparse.

This chart shows the approximate

amount of light received by gardens of

various sizes with a very efficient reflector.