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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1000W Led Plant Grow Light Full Spectrum Lamp Indoor Greenhouse Veg & Flower Ln-1000W Led Plant Grow Light Full Spectrum Lamp Indoor Greenhouse Veg & Flower Ln- $134.46 20pcs 16mm Barb Straight Connector Fittings for Agricultural Garden Irrigation20pcs 16mm Barb Straight Connector Fittings for Agricultural Garden Irrigation $7.12 Was: Previous Price $7.49
Blueprint Controllers Co2 Generator Ng High Altitude, Cgng-8HBlueprint Controllers Co2 Generator Ng High Altitude, Cgng-8H $385.77 1000W Led Grow Lamp Panel Light Hydroponic Plant Greenhouse Full Spectrum Trf1000W Led Grow Lamp Panel Light Hydroponic Plant Greenhouse Full Spectrum Trf $134.14 Was: Previous Price $141.20
100 Count- Jiffy 30 Mm Peat Soil Pellets Seeds Starting Plugs: Indoor Seed St.100 Count- Jiffy 30 Mm Peat Soil Pellets Seeds Starting Plugs: Indoor Seed St. $16.51 Vivosun 20 Pcs Spring Loaded Plant Clips for Flowers Stems Vines Stalks SupportVivosun 20 Pcs Spring Loaded Plant Clips for Flowers Stems Vines Stalks Support $8.99
PopularGrow 2Pc Dimmable 300W Led Grow Light Full Spectrum IndoorTent PlantingPopularGrow 2Pc Dimmable 300W Led Grow Light Full Spectrum IndoorTent Planting $169.65 Was: Previous Price $261.00 Method Seven Operator Hps Plus Grow Room GlassesMethod Seven Operator Hps Plus Grow Room Glasses $111.06
20pcs 16mm Barbed Drip Elbow Connector Agricultural Garden Irrigation Fittings20pcs 16mm Barbed Drip Elbow Connector Agricultural Garden Irrigation Fittings $7.02 Was: Previous Price $7.39 Dyna-Gro Pure Neem Oil Natural Leaf Polish, 8 OuncesDyna-Gro Pure Neem Oil Natural Leaf Polish, 8 Ounces $127.35
200 Count- Jiffy 7 Peat Soil 36mm ~ Standard ~ Pellets Seeds Starting Plugs: .200 Count- Jiffy 7 Peat Soil 36mm ~ Standard ~ Pellets Seeds Starting Plugs: . $25.45 1000W 500W Led Grow Light Panel Lamp Hydro Medical Plant Grow Full Spectrum Trf1000W 500W Led Grow Light Panel Lamp Hydro Medical Plant Grow Full Spectrum Trf $82.21 to $134.14 Was: Previous Price $88.65
600W 1000W 1200W Led Grow Light Kit Full Spectrum Panel Indoor Garden Veg Flower600W 1000W 1200W Led Grow Light Kit Full Spectrum Panel Indoor Garden Veg Flower $79.69 to $99.99 37 Micron Food Grade Extraction Tea Bags For Rosin/ Essential oils Pressing37 Micron Food Grade Extraction Tea Bags For Rosin/ Essential oils Pressing $11.99
Hydro-Logic Algae Block SleeveHydro-Logic Algae Block Sleeve $18.66 20pcs16mm Tee Hose Joiner Plastic Barbed T Bar Connector Pipe Fitting Irrigation20pcs16mm Tee Hose Joiner Plastic Barbed T Bar Connector Pipe Fitting Irrigation $8.35 Was: Previous Price $8.79
Castnoo 1000W 500W Led Grow Light Lamp For Hydro Plant Veg Grow Full Spectrum TfCastnoo 1000W 500W Led Grow Light Lamp For Hydro Plant Veg Grow Full Spectrum Tf $2.36 to $134.14 Was: Previous Price $86.54 1000W Led Grow Light Hydro Full Spectrum Veg Flower Indoor Plant Lamp Panel Ln-1000W Led Grow Light Hydro Full Spectrum Veg Flower Indoor Plant Lamp Panel Ln- $134.46
1000W 500W Watt Led Grow Light Lamp Veg Flower Oganic Growing Full Spectrum Ln-1000W 500W Watt Led Grow Light Lamp Veg Flower Oganic Growing Full Spectrum Ln- $2.35 to $134.46 Castnoo 1000W Led Grow Light Full Spectrum Indoor Hydro Veg Flower Grow Panel TyCastnoo 1000W Led Grow Light Full Spectrum Indoor Hydro Veg Flower Grow Panel Ty $134.43
200 Jiffy 7 Peat Pellets 30mm - Seeds Starting - Jiffy Peat Pellet Helps to A.200 Jiffy 7 Peat Pellets 30mm - Seeds Starting - Jiffy Peat Pellet Helps to A. $23.95 250 Jiffy 7 Peat Pellets 50mm - Large Pellets - Seeds Starting - Jiffy Peat P.250 Jiffy 7 Peat Pellets 50mm - Large Pellets - Seeds Starting - Jiffy Peat P. $69.95
500W Led Grow Light Panel Light Indoor Hydro Plant Grreenhouse Full Spectrum Trf500W Led Grow Light Panel Light Indoor Hydro Plant Grreenhouse Full Spectrum Trf $80.94 Was: Previous Price $85.20 Super Sprouter Premium Heated Propagation Kit w/ T5 LightSuper Sprouter Premium Heated Propagation Kit w/ T5 Light $74.95
Standard Insert (72 Units)Standard Insert (72 Units) $1.59 100Ml Plastic Syringe Measuring Nutrient Sterile Reusable For Hydroponicsn 356100Ml Plastic Syringe Measuring Nutrient Sterile Reusable For Hydroponicsn 356 $2.29
1-50Ml Plastic Hydroponics Disposable Measuring Pet Food Nutrient Syringe D1Ce1-50Ml Plastic Hydroponics Disposable Measuring Pet Food Nutrient Syringe D1Ce $0.99 to $97.17 Full Spectrum 1000W 500W Led Grow Light Flower Bloom Indoor Hydroponic Plant Ad.Full Spectrum 1000W 500W Led Grow Light Flower Bloom Indoor Hydroponic Plant Ad. $82.38 to $132.34
1000W 500W Led Grow Light Panel Hydroponic Plant Veg Growing Full Spectrum Trx1000W 500W Led Grow Light Panel Hydroponic Plant Veg Growing Full Spectrum Trx $2.36 to $132.14 Was: Previous Price $86.54 100 Count- Jiffy 36 Mm Peat Soil Pellets100 Count- Jiffy 36 Mm Peat Soil Pellets $15.45
2Pcs 300W Full Spectrum Led Grow Light Indoor Hydroponic Plants Veg Flower Lamp2Pcs 300W Full Spectrum Led Grow Light Indoor Hydroponic Plants Veg Flower Lamp $104.85 Blueprint Controllers Co2 Generator Lp, Cglp-8Blueprint Controllers Co2 Generator Lp, Cglp-8 $384.29
Monteray Monterey Garden Insect Spray with Spinosad Concentrate 16ozMonteray Monterey Garden Insect Spray with Spinosad Concentrate 16oz $21.29 $16.65
1000W Watt Led Grow Light Lamp Plants Veg Flower Oganic Growing Full Spectrum K#1000W Watt Led Grow Light Lamp Plants Veg Flower Oganic Growing Full Spectrum K# $133.75 Seedling Starter Trays, 144 Cells: (24 Trays; 6-cells Per Tray), Plus 5 Plant.Seedling Starter Trays, 144 Cells: (24 Trays; 6-cells Per Tray), Plus 5 Plant. $10.95
Castnoo 1000W Led Grow Light Full Spectrum For Hydro Veg Flower Grow Panel TljCastnoo 1000W Led Grow Light Full Spectrum For Hydro Veg Flower Grow Panel Tlj $141.20 Castnoo 1000W Led Grow Light Full Spectrum Hydro Veg Flower Grow Panel Lamp TlfCastnoo 1000W Led Grow Light Full Spectrum Hydro Veg Flower Grow Panel Lamp Tlf $2.42 to $134.43
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Prices current as of last update, 10/16/17 8:48pm.

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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