A unit of measure of the rate of electron flow or current in an electrical conductor. One Amp is equal to a flow of one coulomb (6.24 x 1018 charge carriers) per second.
The luminous intensity of a source that emits monochromatic radiation of frequency 540 × 1012 hertz. One candela is close to the light intensity produced by an ordinary candle. The candela is similar to lumen but the key difference is that the lumen measures the total visible light output, whereas the candela addresses directional intensity .
Illuminating power expressed in candelas or candles.
A diffused light which covers a wide area but does not offer distance. Ideal for lighting the surrounding area of equipment
FOOT CANDLE & L.U.X.
Both units measure the same thing, the amount of visible light that falls on a surface, in different units of measurement (Foot Candle – Imperial measurement, L.U.X. – Metric Measurement) To better understand foot-candle, imagine that you have a one candela light source located in the center of a sphere. If the radius of that sphere is a distance of one foot, a foot-candle is the amount of light that falls on the inside surface of that sphere. For the L.U.X., take that same example and simply change the radius of the sphere to a distance of one meter. One foot-candle is approximately10.764 lux.
Emitting light as a result of being heated.
(or “Ingress Protection”) Ratings are defined levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies (tools, dirt, etc.) and moisture by mechanical casings and electrical enclosures.
KELVIN COLOUR TEMPERATURE SCALE
A measurement in Kelvin (K) degrees indicates the hue of a specific type of light source. The color temperature of a light source is the temperature of an ideal black-body radiator that radiates light of comparable hue to that light source.
The light emitted per second in a cylindrical angle by a point source of one candela. A much simpler definition would be one lumen is equivalent to the amount of light put out by one candle when you are standing one foot away from it.
RAW vs. EFFECTIVE Lumens
Raw lumens are theoretical rather than the actual measure of useful light output. Manufacturers calculate raw lumen output by multiplying the number of LEDs in a light by their maximum output rating.
If a light uses 10 L.E.D.’s that have a maximum output rating of 100 lumens, the raw lumen output would be 1,000 lumens (10 x 100 = 1,000)
Effective lumen is a actual measurement of usable light by taking into account loses and inefficiencies
The most narrow focus light pattern which provides a focused beam at a greater distance
A mid-focused light pattern that provides distance lighting in the front and ditches.
An electromotive force or potential difference expressed in volts. The greater the voltage, the greater the flow of electrical current. Voltage can be either direct (DC) or alternating (AC).
Equivalent to one joule per second. The watt is used to the total power output from a light source. The term “wattage” refers to “electrical power in watts”.