Dual spectrum compact fluorescent grow light. Actual length is about 40cm.Incandescent lightbulb
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Grow Lights

A Grow light is an electric lamp designed to promote plant growth by emitting an electromagnetic spectrum appropriate for photosynthesis. It emits a light spectrum similar to that from the sun, allowing indoor growth with outdoor conditions. more...

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Different light spectrums are used for the different stages of plant growth. The initial vegetative stage requires blue spectrum of light, whereas the later 'flowering' stage is usually done with red/orange spectrums. The lights can be bought by spectrum colour specifically, or some companies such as Sylvania Grolux produce a full spectrum bulb which caters for all stages of growth.

The light is usually used in conjunction with a reflector, to control and intensify the light emissions, and will include an electrical ballast to control the flow of current flowing to the light. This is required because of the high intensity of the light that is necessary to produce something akin to sunlight.

Lamp types used as grow lights include high-intensity discharge lamps, fluorescent lamps and LEDs. Grow lights are most used for indoor gardening, including indoor hydroponics and aquatic plants.

The most widely used lights for professional indoor flower and vegetable growing are HPS/SON (high pressure sodium) and MH (metal halide). These are types of HID or high-intensity discharge lamps.

The bigger the plant gets the more light it requires; if there is not enough light, a plant will not grow, regardless of other conditions.

For indoor gardening one of the most important topics is light density, measured in lux. Light density is the amount of light incident on a surface. One lux equals one lumen (unit) of light falling on an area of one square meter. A brightly lit office would be illuminated at about 400 lux. In Imperial (pounds-feet) terms, a foot-candle, or the intensity of a standard candle on an area of 1 square foot, is about 10.76 lux.

Cool white fluorescent lamps are sometimes used as grow lamps. These offer slightly lower performance, a white light, and lower purchase cost.

Read more at Wikipedia.org


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Seed Starter Kit, 1020 Size with Grow Light, Heat Mat, and Humidity DomeSeed Starter Kit, 1020 Size with Grow Light, Heat Mat, and Humidity Dome $94.99 2-Pack Seedling Starter Kit with Full-Spectrum Grow Light & Vent Humidity Dome2-Pack Seedling Starter Kit with Full-Spectrum Grow Light & Vent Humidity Dome $63.99
Full Spectrum Led Grow Lights 2Ft 4Ft Plant Light Fixtures Seed Starting 20W 40WFull Spectrum Led Grow Lights 2Ft 4Ft Plant Light Fixtures Seed Starting 20W 40W $59.39 Seed Starter Tray with Grow Light, 5 Pack 60-Cell Self Watering Seed Starting.Seed Starter Tray with Grow Light, 5 Pack 60-Cell Self Watering Seed Starting. $30.53
Seed Starter Kit with Grow Light - 80 Cells Tray for Indoor Planting - 2 PackSeed Starter Kit with Grow Light - 80 Cells Tray for Indoor Planting - 2 Pack $45.99 Seed Starter Tray with Grow Light, Self Watering Seed Starting Trays with Dome RSeed Starter Tray with Grow Light, Self Watering Seed Starting Trays with Dome R $47.99
1020 Seed Starting Kit with Adjustable Height Grow Light & Humidity Control1020 Seed Starting Kit with Adjustable Height Grow Light & Humidity Control $122.41 Seed Starter Tray 5 Pack Seed Starter Kit with Grow Light and Green-60 CellsSeed Starter Tray 5 Pack Seed Starter Kit with Grow Light and Green-60 Cells $31.45
Seed Starter Tray with Light, Seed Starting Trays Kits with Humidity Domes PlantSeed Starter Tray with Light, Seed Starting Trays Kits with Humidity Domes Plant $36.08 Harvest Elite Indoor Garden Hydroponic System with Led Grow Light and Seed Ki.Harvest Elite Indoor Garden Hydroponic System with Led Grow Light and Seed Ki. $237.98
T5 Grow Lights for Seed Starting, 16 in Long, 2-Count (10W 2 Count (Pack of 1)T5 Grow Lights for Seed Starting, 16 in Long, 2-Count (10W 2 Count (Pack of 1) $27.64 Seed Starter Tray with Grow Light, 2 Packs 80 Cells Seed Starting Kit Seedling SSeed Starter Tray with Grow Light, 2 Packs 80 Cells Seed Starting Kit Seedling S $56.99
Seed Starter Tray 5 Pack Seed Starter Kit with Grow Light and Humidity Dome ReusSeed Starter Tray 5 Pack Seed Starter Kit with Grow Light and Humidity Dome Reus $38.99 2 Packs 80 Cells Seed Starter Tray with Grow Light, Starting Kit, Reusable Seedl2 Packs 80 Cells Seed Starter Tray with Grow Light, Starting Kit, Reusable Seedl $57.99
Seed Starter Tray 5 Pack Self-Watering Seed Starter Kit with Grow Light and HumiSeed Starter Tray 5 Pack Self-Watering Seed Starter Kit with Grow Light and Humi $48.99 2X 40 Hole Plant Propagator Seed Tray with Grow Light Full Spectrum Adjustable2X 40 Hole Plant Propagator Seed Tray with Grow Light Full Spectrum Adjustable $29.99
Seed Starter Kit with Grow Light, Heat Mat, 7" Humidity Dome & Light StandSeed Starter Kit with Grow Light, Heat Mat, 7" Humidity Dome & Light Stand $68.74 T5 Grow Lights for Seed Starting, 16 in Long, 2-Count (10W X2) Full Spectrum LedT5 Grow Lights for Seed Starting, 16 in Long, 2-Count (10W X2) Full Spectrum Led $31.21
2X 40 Holes Seed Starter Trays with Grow Light Adjustable Humidity Germination2X 40 Holes Seed Starter Trays with Grow Light Adjustable Humidity Germination $26.59 Seed Starter Tray, 6 Pack 72 Cells Plant Grow Kit with Adjustable HumiditySeed Starter Tray, 6 Pack 72 Cells Plant Grow Kit with Adjustable Humidity $26.52
SunBlaster Sl1600198 T5Ho Micro T5 Grow Light Garden for Seed Starting, BlackSunBlaster Sl1600198 T5Ho Micro T5 Grow Light Garden for Seed Starting, Black $79.99 Seed Starter Tray with Grow Light, 2 Packs 80 Cells Seed Starting Kit, ReusableSeed Starter Tray with Grow Light, 2 Packs 80 Cells Seed Starting Kit, Reusable $54.78
3 Bars Grow Lights for Seed Starting, 16" Grow Strip Full Spectrum Grow Light3 Bars Grow Lights for Seed Starting, 16" Grow Strip Full Spectrum Grow Light $28.32 5Pcs Seed Starter Trays with Grow Light Seed Growing Starting Germination Trays5Pcs Seed Starter Trays with Grow Light Seed Growing Starting Germination Trays $21.99
2 Packs 80 Cells Seed Starter Trays Kit with 4 Grow Light Seed Starter Kit Seedl2 Packs 80 Cells Seed Starter Trays Kit with 4 Grow Light Seed Starter Kit Seedl $69.99 Seed Starter Tray with Grow Lights and Heat Mat,3-In-1 Soil Meter, 80-Cell SeedSeed Starter Tray with Grow Lights and Heat Mat,3-In-1 Soil Meter, 80-Cell Seed $89.93
Grow Lights for Seed Starting with Stand, 2ft T5 144 Leds Full SpectrumGrow Lights for Seed Starting with Stand, 2ft T5 144 Leds Full Spectrum $57.20 2X 40 Seed Plant Starter Trays with Grow Light Adjustable Humidity Germination2X 40 Seed Plant Starter Trays with Grow Light Adjustable Humidity Germination $27.99
Innovative Self-Watering Seedling Tray with Smart Led Grow Light Control SystemInnovative Self-Watering Seedling Tray with Smart Led Grow Light Control System $65.99 3 Head Grow Lights for Seed Starting, 6000K Full Spectrum Grow Lights for3 Head Grow Lights for Seed Starting, 6000K Full Spectrum Grow Lights for $35.70
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Prices current as of last update, 03/21/25 1:44am.

See also...
Grow Light, Grow Lights, Hydroponics & Seed Starting, Gardening & Plants
Grow Light Hps, Grow Lights, Hydroponics & Seed Starting, Gardening & Plants

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