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post #2 of (permalink) Old 07-05-2012, 05:33 AM Thread Starter
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Join Date: Aug 2009
Location: Vancouver, WA, USA
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2. Vocabulary:
Gotta know the lingo! If you know something that belongs here, or have a clearer definition for some of these things as they apply to LED’s, help me add to this list!
  1. Amps: the basic unit of electric current in the SI system
  2. Beam Spread: the angle in degrees that light is spread from the LED or limited to by the optics
  3. Current: the rate of flow of an electric charge through a conductor
  4. Controller: can be a potentiometer or “intelligent” controller that determines the intensity of light. “Intelligent” controllers may also control effects like dawn/dusk, mid-day “burst”, integrated moonlighting, etc.
  5. Driver: converts the AC current (US standard) into DC current, and regulates the current to the emitters. Necessary to operate an LED fixture
  6. Emitter: the LED itself; the source of the light. It is NOT a lamp, bulb, or light
  7. Forward voltage: the amount of voltage dropped by each emitter in a series circuit of LED’s.
  8. Optics: individual reflectors that focus the direction of each emitter’s light
  9. PAR: Photosynthetically Active Radiation. This is the particular EM wavelengths under which photosynthesis is most active.
  10. Parallel: the way in which electrical components or circuits are connected so that the same voltage is applied across each component or circuit
  11. Series: a set of two or more electronic components through which current flows in sequence
  12. Tinning: preparing a surface for soldering by applying a small amount of solder to a solder plate or wire before assembly. (Limits the amount of time heat is applied to an emitter)
  13. Volt: the unit of electromotive force and electric potential difference equal to the difference between two points in a circuit carrying one ampere of current and dissipating one watt of power.
  14. Watts: the international SI unit of power equal to the power produced by a current of one ampere acting across a potential difference of one volt.

Last edited by theblondskeleton; 07-06-2012 at 01:18 AM.
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