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lumen 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.
beam-angle BEAM ANGLE

Beam angle refers to a light source’s measure of spread and is measured in degrees. A light’s beam angle is determined when its lux level drops to half of the intensity of the centre beam (see diagram). Beam angles are commonly 15, 30, 45 and 60 degrees.
rated-life RATED LIFE

Rated Life is the average life of a lighting product when operated at nominal lamp voltage. A light’s lifespan will depend on its type. Incandescent light bulbs are very cheap and will last approximately one year. In contrast, LEDs have a high initial cost but will not need to be changed for 30 years with a rated life of up to 100,000 hours.

Different light bulbs emit different colors of light. 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.

Luminous efficacy measures how efficient a light source is at converting electricity power to light. It is measured in lumen output per unit power input (watt). Efficacy = lumen / wattage

Colour Rendering Index (CRI) is a way of measuring how vibrant a light source makes colours appear. In other words, it’s a measurement of the light colour quality. The index ranges from 0 to 100 the best being above 80. A light’s CRI can only be compared to another light if they have the same colour temperature.

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

Ambient temperature is a term which refers to the temperature in a room, or the temperature which surrounds an object. Ambient temperatures play a major role in personal comfort, as well as the function of many types of machines and equipment, and various methods can be used to control ambient temperature. Usually, control methods are designed to keep the temperature stable.
gimbal 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.

In electronic systems, a heat sink is a passive component that cools a device by dissipating heat into the surrounding air. Heat sinks are used to cool electronic components such as high-power semiconductor devices, and optoelectronic devices such as higher-power lasers and light emitting diodes (LEDs).
voltage1 VOLTAGE

Voltage is the change in electric potential (meaning potential energy per unit charge) between two positions. The voltage is always measured between two points, for example between the positive and negative ends of a battery, or between a wire and ground. It is measured in volts.
luminous-flux LUMINOUS FLUX

Luminous flux is the measure of the perceived power of light, adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light. It is measured in Lumens or Watts
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