TCC - Ch 6 Electric Lightbulbs Efficiency
Candle power
original unit of light intensity
Lux
the SI unit of illuminance, equal to one lumen per square metre.
Lumen
the SI unit of luminous flux, equal to the amount of light emitted per second
Watts
the unit of power (rate of doing work).
Quatz halogen spot lights
(of a high-intensity electric lamp) using a quartz bulb containing the vapour of a halogen, usually iodine.
Dimmer switch
A switch that can control voltage and current flow by increasing or decreasing resistance. Use a variable resistor to do this - affects light intensity, BUT does not reduce power consumption!
Compact Fluorescent
Compact fluorescent lamps (CFL) are small fluorescent light bulbs that use up to 75% less energy than a traditional incandescent bulb
Fluorescent tube
Gas filled tube with fluorescent powder that glows with electrical charge.
LED light
LED stands for light-emitting diodes. A solid-state highly efficient light source.
Energy efficient
Products and systems that use less energy than their conventional counterparts to perform the same tasks - ie energy efficient light bulbs.
Amperage
The actual amount of flow of electricity or electrons; the unit is the amp or ampere.
Footcandle
The basic unit of illumination arriving at a work surface. One footcandle is equal to one lumen per square foot.
Carbon footprint
The cumulative amount of carbon, or carbon dioxide equivalent, that a person or institution emits, and is indirectly responsible for emitting, into the atmosphere, contributing to global climate change.
Amp hour
The most common unit used to express battery capacity. Amp hours are a product of current and time - measure of total usable charge inside of the battery.
Incandescent bulb
a lightbulb in which electricity passes through a wire, that heats up and produces light
Energy emission
after atom in excited state returns to ground state, emits photon of energy in form of electromagnetic radiation
Halogen bulb
an incandesent lamp that burns brighter than regular light bulbs