Agriculture Reference
In-Depth Information
FIGURE 3.4
Parabolic and cone reflectors for HID lights. (Courtesy of Sunlight
Supply, Inc., Vancouver, Washington.)
FIGURE 3.5
Square reflector, 8-inch air cooled for HID lamps. (Courtesy of
Sunlight Supply, Inc., Vancouver, Washington.)
the bulb and a glass shield to assist in moving hot air away from the lights
(Figure 3.5). Square-shaped reflectors are best for square growing areas.
For example, Sunlight Supply's 8-inch Blockbuster Reflector (Figure 3.5)
covers a growing area of 4 × 4 feet. Sunlight Supply also makes a 4-foot
diameter Vertizontal reflector that uses all sizes of MH and HPS lamps
(Figure 3.6). It is said to provide a wide area of coverage from low mount-
ing heights. Horizontal reflectors are recommended for HPS systems and
where light movers are used. Some of the reflectors accept MH or HPS
lamps ranging from 250 to 400 watts. Prices range from $120 to over $200.
Lighting is more efficient when using a reflective Mylar covering on the
walls surrounding your hydroponic unit to reflect light back into the plants
from the sides. Mylar will reflect up to 98% of the light striking it. It is
available in rolls 1 or 2 mil thickness.
