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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60W Led Grow Lights for Seed Starting, 2ft Hanging Full Hanging Grow Light-W60W Led Grow Lights for Seed Starting, 2ft Hanging Full Hanging Grow Light-W $102.51 Seed Starting Grow Light - Full-Spectrum Led with Adjustable Height & Integra.Seed Starting Grow Light - Full-Spectrum Led with Adjustable Height & Integra. $141.61
Grow Lights for Seed Starting 16" Full Spectrum 6500K with Timer 2 PackGrow Lights for Seed Starting 16" Full Spectrum 6500K with Timer 2 Pack $33.53 Seed Starter Tray Kit w/ Grow Light & Humidity Dome – 5 Pack, Indoor UseSeed Starter Tray Kit w/ Grow Light & Humidity Dome – 5 Pack, Indoor Use $23.99
2 Head Grow Lights for Seed Starting, Full Spectrum Grow Lights for Indoor Pl.2 Head Grow Lights for Seed Starting, Full Spectrum Grow Lights for Indoor Pl. $23.62 Latest Astronaut 240W Led Grow Light for Seed Starting, with Uv&Ir, Adjustabl.Latest Astronaut 240W Led Grow Light for Seed Starting, with Uv&Ir, Adjustabl. $298.09
Grow Lights for Seed Starting with Stand, 2Ft T5 144 Leds Full Spectrum SeedlingGrow Lights for Seed Starting with Stand, 2Ft T5 144 Leds Full Spectrum Seedling $62.97 12 Cell Seed Starter Kit with Grow Light and Graphene Heating Mat, Reusable Seed12 Cell Seed Starter Kit with Grow Light and Graphene Heating Mat, Reusable Seed $65.64
joyhalo 12 Cell Seed Starter Kit with Grow Light and Graphene 12 Cell, Greenjoyhalo 12 Cell Seed Starter Kit with Grow Light and Graphene 12 Cell, Green $67.55 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
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 $30.70 Led Grow Lights for Seed Starting with Stand, 2ft 60W Full Spectrum Seedling LigLed Grow Lights for Seed Starting with Stand, 2ft 60W Full Spectrum Seedling Lig $107.59
Grow Light for Seed Starting with Stand,T5 Grow Lights 1.4Ft,Seed StarterGrow Light for Seed Starting with Stand,T5 Grow Lights 1.4Ft,Seed Starter $35.47 40 Cell Seed Starter Kit with Grow Light and Graphene Heating Mat, Reusable40 Cell Seed Starter Kit with Grow Light and Graphene Heating Mat, Reusable $54.59
Full Spectrum Led Indoor Garden Seed Starting Plant Grow Lights Set of 6Full Spectrum Led Indoor Garden Seed Starting Plant Grow Lights Set of 6 $53.10 joyhalo 40 Cell Seed Starter Kit with Grow Light and Graphene Heating Mat, Rejoyhalo 40 Cell Seed Starter Kit with Grow Light and Graphene Heating Mat, Re $58.99
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 $40.49 to 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 $52.81
4-Pack Seed Starter Kit with Adjustable Grow Lights & 2 Heat Mats – 5'4-Pack Seed Starter Kit with Adjustable Grow Lights & 2 Heat Mats – 5' $85.81 Self Watering Seed Starter Kit with Grow Light, 2/6 Pack /72 Cells Seed StarterSelf Watering Seed Starter Kit with Grow Light, 2/6 Pack /72 Cells Seed Starter $24.49 to
Seed Starter Trays with Grow Lights 72 Cells Seed Starter Kit with Lights 3 L.Seed Starter Trays with Grow Lights 72 Cells Seed Starter Kit with Lights 3 L. $37.63 Grow Lights for Seed Starting, 2Ft Led Full Spectrum Seedling Lights with StandGrow Lights for Seed Starting, 2Ft Led Full Spectrum Seedling Lights with Stand $68.20
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 $37.13 16" Grow Lights for Seed Starting, Full Spectrum Grow Lights for Indoor Plants16" Grow Lights for Seed Starting, Full Spectrum Grow Lights for Indoor Plants $28.49
4Pcs 4Ft Led Grow Light Kits Plant Light Full Spectrum Seeds Starting Gardening4Pcs 4Ft Led Grow Light Kits Plant Light Full Spectrum Seeds Starting Gardening $65.99 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. $307.38
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 $60.99 bseah Plant Lights for Indoor Plants Grow Lights for Seed Starting Auto On & .bseah Plant Lights for Indoor Plants Grow Lights for Seed Starting Auto On & . $35.10
60-Cell Self-Watering Seed Starter Tray with Grow Light, Seed Starter Kit with 460-Cell Self-Watering Seed Starter Tray with Grow Light, Seed Starter Kit with 4 $59.11 Lpmzmbl Led Grow Lights for Seed Starting with Stand 2ft 60W Full Spectrum Se.Lpmzmbl Led Grow Lights for Seed Starting with Stand 2ft 60W Full Spectrum Se. $98.71
T5 Grow Lights for Seed Starting, 16 Inches, 2-Count (10W X2) Full Spectrum LedT5 Grow Lights for Seed Starting, 16 Inches, 2-Count (10W X2) Full Spectrum Led $27.03 Seed Starter Tray 80 Cells W/ Grow Light Adjustable Humidity Indoor Gardening UsSeed Starter Tray 80 Cells W/ Grow Light Adjustable Humidity Indoor Gardening Us $45.51
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 $58.96 Grow Light for Seed Starting with Stand,T5 Grow Lights 1.4Ft,Seed Starter LightGrow Light for Seed Starting with Stand,T5 Grow Lights 1.4Ft,Seed Starter Light $62.92
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 $35.99
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Prices current as of last update, 05/15/25 1:14pm.

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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