Plants respond to
the relative lengths to light and dark periods as well
as to the intensity and quality of light. Artificial
light has been used extensively to control plant growth
processes under various conditions. Plants differ in the
need for light; some thrive on sunshine, others grow
best in the shade. Most plants will grow in either
natural or artificial light. Artificial light can be
used to provide high intensity light when increased
plant growth is desired and to extend the hours of
natural daylight or to provide a night interruption to
maintain the plants on long-day conditions.
Proper lighting
not only extends the gardening day by enabling the
gardener to work in the greenhouse during the dark
evenings of winter and early spring, but it aids plant
growth. Three basic types of lamps used in greenhouse
lighting are:
1. METAL
HALIDE LAMPS - This type of light is blue-orientated in
the spectrum. It is the best type of light to be used as
a primary light source (if no or little natural sunlight
is available). This type of lamp promotes plant growth.
METAL HALIDE LAMPS
STANDARD METAL HALIDE LAMPS |
| MODEL NUMBER |
DESCRIPTION |
BASE PRICE |
ORDER ONLINE |
| GL-901625-MH |
M175/U/MED
BASE (6/CASE) |
$32.97 |
 |
| GL-901640-MH |
MH 250
G.E. (12/CASE) |
$29.97 |
|
| GL-901650-MH |
MH 400
G.E. (6/CASE) |
$29.97 |
|
| GL-901665-MH |
MH 1000 U
BT-56 G.E. (6/CASE) |
$54.97 |
|
| GL-901675-MH |
MH 1000 U
BT-37 G.E. (6/CASE) |
$65.97 |
|
2. HIGH
PRESSURE SODIUM LAMPS - These lamps are red/orange
in the spectrum. They are the best lamps available
for secondary or supplementary lighting (used in
conjunction with natural sunlight). This" type of
light promotes
flowering/budding in plants. It is ideal for
Greenhouses/Commercial growing applications.
|
STANDARD HPS LAMPS |
| MODEL NUMBER |
DESCRIPTION |
BASE PRICE |
ORDER ONLINE |
| GL-901505-HPS |
LU150/55/MED(E17)(E26)(6/BOX) |
$23.97 |
|
| GL-901510-HPS |
LU150/55 (MOGUL
BASE)(12/CASE) |
$23.97 |
|
| GL-901515-HPS |
LU 250 G.E. (12/CASE) |
$24.97 |
|
| GL-901520-HPS |
LU 400 G.E. (12/CASE) |
$25.97 |
|
| GL-901525-HPS |
LU 600 HPS (12/CASE) |
$89.97 |
|
| GL-901527-HPS |
LU 750 HPS SYL (6/CS) |
$89.97 |
|
| GL-901530-HPS |
LU 1000 G.E.(6/CASE) |
$69.97 |
|
|
ULTRA SUN™
HPS LAMPS |
| MODEL NUMBER |
DESCRIPTION |
BASE PRICE |
ORDER ONLINE |
| GL-901523-HPS |
ULTRASUN
150 HPS (12/CS) |
$18.97 |
|
| GL-901529-HPS |
ULTRASUN
250 HPS (24/CS) |
$19.97 |
|
| GL-901528-HPS |
ULTRASUN
400 HPS (24/CS) |
$19.97 |
|
| GL-901526-HPS |
ULTRASUN
600 HPS (24/CS) |
$59.97 |
|
| GL-901531-HPS |
ULTRASUN
1000 HPS (12/CS) |
$61.97 |
|
3. FLUORESCENT - This
type of light is perfect for starts and seedlings
but is a poor light source for growth and budding
primarily because of low lumen output.
|
FLUORESCENT LAMPS |
| MODEL NUMBER |
DESCRIPTION |
WATT |
KELVIN |
APPROX. INITIAL LUMENS |
BASE PRICE |
ORDER ONLINE |
| 4 FOOT LAMPS |
| GL-901587-FL |
F54 HO/54W/830 - RED |
54 |
3000° |
5,000 |
$15.97 |
|
| GL-901588-FL |
F54
HO/54W/865 - BLUE |
54 |
6500° |
5,000 |
$15.97 |
|
| 3 FOOT LAMPS |
| GL-901895-FL |
F39 HO
W/T5/39W/865 - BLUE |
39 |
6500° |
3,300 |
$15.97 |
|
| 2 FOOT LAMPS |
| GL-901586-FL |
F24
HO/24W/865 - BLUE |
24 |
6500° |
2,000 |
$14.97 |
|
| GL-901591-FL |
F24
HO/24W/8830 - RED |
24 |
3000° |
2,000 |
$14.97 |
|
| Use only these High Output (H.O.) lamps
in Tek-Light™ T5, Sun Blaze®, Inner Sun™, Spectra Max, Ready Fit™ & New
Wave® T5 fixtures. |
MORE GROW LAMP INFORMATION
High-intensity discharge (HID) lamps -
These have a long life (5000 hours or
more). With improvements made possible by the addition
of sodium and metal-halides, the lamp has a high
emission of light in the regions utilized by plants.
These have a long life (5000 hours or more). With
improvements made possible by the addition of sodium and
metal-halides, the lamp has a high emission of light in
the regions utilized by plants.
Fluorescent lamps - These
have the advantage of higher light efficiency with low
heat. This type of lamp is the most widely used for
supplemental light. It is available in a variety of
colors but cool-white lamps are the most common. High
intensity (1500 ma) fluorescent tubes that require
higher wattage are also commonly used to reach 2000 foot
candles. - These have the advantage of higher light
efficiency with low heat. This type of lamp is the most
widely used for supplemental light. It is available in a
variety of colors but cool-white lamps are the most
common. High intensity (1500 ma) fluorescent tubes that
require higher wattage are also commonly used to reach
2000 foot candles.
CONVERSION LAMPS - There are two types (A) Sodium Lamps
which run on halide ballasts - more common, and (B)
Halide Lamps which run on sodium ballasts. This type of
lamp allows you to tailor the light source to the growth
stage of the plant (again using halide blue light for
growth and sodium red light for flowering/budding)
merely by changing lamps.
Incandescent lamps -
These vary in size from 60 watts to 500 watts. They are
used to extend day- length in greenhouses. The grower
can vary foot- candle levels by adjusting the spacing
and mounting height above the plants. These vary in size
from 60 watts to 500 watts. They are used to extend day-
length in greenhouses. The grower can vary foot- candle
levels by adjusting the spacing and mounting height
above the plants.
Light Meters -
Inexpensive light meters are available for measuring the
light intensity. The most common light meters are
calibrated in foot candles or lux (10.76 foot candles).
Foot candles should be measured at the growing level of
the plants. Research your particular type of plant and
find out what the optimum foot candles are for growth or
propagation. Adjust your light height accordingly so
that the the foot candles are correct at the growing
level when measured with the light meter.
LIGHT INTENSITY METER
Measure
the number of foot-candles from sunlight or grow lights
to create the optimum growing conditions for your
plants.
Information booklet with recommendations included. No
batteries required. GS-775
