Growing Elite Marijuana

natural looking light is desired.
HIGH PRESSURE SODIUM or HPS
lamps emit a pink or amber light. They are
used to illuminate parking lots and other
areas where the color of the light is not
important. HPS units are more efficient than
MH lamps. They are often used alone with
no detrimental effect to the plants, and will
promote faster plant growth than MH bulbs
during both vegetative growth and
flowering. Combinations of bulbs are not
required, as the HPS lamp has all the light
spectrums necessary for healthy growth.
MH lamps come in 175, 250, 400 and
1000 watt sizes. HPS lamps come in 150,
400 and 1000 watt sizes. Each lamp has its
own ballast.
HID lighting systems are much more
convenient to use than fluorescents
because the lamps have a higher wattage
and are more efficient at producing light
than fluorescents. Large wattage systems
are more efficient than smaller ones. MH
lamps have an efficiency of 35-50%
depending on the wattage. HPS lamps
have an efficiency of 50-55%. Moving the
lamp and reflector is fairly easy since they
are fairly light. The light is powered by a
heavy ballast; but it is connected only by a
long electrical wire. Some 400 watt HID
systems are manufactured with the ballast
built into the same housing as the reflector.
These lamps are harder to move around
and are usually considered for lighting only
if they are to be permanently mounted.
This chart shows how much light each
lamp emits, its lumen output per 100 watts
and the area it covers adequately.