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Prime Lens - A lens whose focal length is fixed. Prime lenses are not as versatile as zoom lenses, but are generally superior in optical quality. This is due to the simplisity of design with fewer moving parts th. Used . at can be optimized for one specific focal length. . Used . ...

Kelvin - The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvins is absolute zero (when molecular motion stops), and one kelvin is . Used . the fraction 1/273.16 of the thermodynamic temperature of the triple point of water. The Celsius temperature scale is now defined in terms of the kelvin, with 0 °C corresponding to 273.15 kel. Used . vins, approximately the freezing point of water under ordinary conditions.

The kelvin is named after the British physicist and engineer William Thomson, 1st Baron Kelvin; his barony was in turn na...

Bulbs - A Bulb or light bulb is a source of artificial light. There are many different kinds of bulbs including High Intensity Discharge or HIDs, Halogen, Fluorescent and Light Emitting Diodes, but the most . Used . common is the incandescence that works by the release of electromagnetic radiation. . Used . ...

Aircraft Landing Light - A narrow beam PAR lamp (28 volt) that is used on aircraft and often adopted for PAR64 and PAR46 lamps. They are most commonly 4 lamps wired in series to attain the required voltage of the circuit as . Used . close to 120 volts. ACL lamps have a higher intensity, brightness and color temperature than the standard PAR lamp.

ACL lamps are more expensive than standard PARs and have a sho. Used . rter life.

Scoop Light - Scoop lights or Scoops are circular fixtures that do not have any lenses. They have a reflector at the back of the fixture that directs the light out of the fixture. Since they do not have any sort o. Used . f lens system they are cheaper than other fixtures. However, the downside of this makes it so that you can not focus the light at all (even PAR's allow for more control than scoops). . Used .