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Lumen

A lumen is a unit of measurement that is used to express how bright a light source is. An easy way to illustrate this measurement is to imagine a birthday cake with candles. A lamp that puts out one lumen of light is as bright as one birthday candle. A lamp that puts out 100 lumens of light is as bright as 100 candles. Thus the higher the amount of lumens, the brighter the light.

A lumen is a unit of measurement that is used to express how bright a light source is. An easy way to illustrate this measurement is to imagine a birthday cake with candles. A lamp that puts out one lumen of light is as bright as one birthday candle. A lamp that puts out 100 lumens of light is as bright as 100 candles. Thus the higher the amount of lumens, the brighter the light.

Color Temperature

Colour temperature is the colour appearance of the light emitted by a source. The colour temperature of lights can generally be categorised as warm, neutral or cool. Normally, the lower the colour temperature, the warmer the light appears and vice versa. Colour temperature is measured on the Kelvin (K) scale. Cool light aids concentration in work areas whereas warm light helps you relax.

Daylight Harvesting

Daylight harvesting is a technology that senses and recognises light levels as they change throughout the day. A daylight harvesting sensor automatically dims LED lights to maintain an exact light level depending on the amount of light needed in that room at that specific time.

Gimbal

A gimballed light allows its direction to be adjusted to a certain degree. Gimbals are useful if you need the light to be projected in a certain direction, such as if light needs to point down a hallway.

Color Rendering (CRI)

Colour Rendering Index (CRI) is a way of measuring how vibrant a light source makes colours appear. In other words, it is a measurement of the light colour quality. The index ranges from 0 to 100. The CRI of one light can only be compared to another light if they have the same colour temperature, which is explained on this page.

Colour Rendering Index (CRI) is a way of measuring how vibrant a light source makes colours appear. In other words, it is a measurement of the light colour quality. The index ranges from 0 to 100. The CRI of one light can only be compared to another light if they have the same colour temperature, which is explained on this page.

Dimmability

Dimmable lights can be adjusted to the right intensity and deliver different amounts of light depending on the situation. The range of light levels a bulb can produce will be affected by its dimmability.

Beam Angle

Beam angle refers to a light source measure of spread and is measured in degrees. A light beam angle is determined when its lux level drops to half of the intensity of the centre beam. Beam angles are commonly 15, 30, 45 and 60 degrees.

Power Efficacy

Power efficacy measures how efficient a light source is at converting electric power to light. It is measured in lumen output per unit power input (watt).

Efficacy = lumen / wattage

Incandescents = 12.8 lm/W

Halogens = 14.4 lm/W

Compact Fluorescents = 45 lm/W

Brightgreen DR700 = 69 lm/W

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