a type of lamp where light is

produced by sending an electrical discharge through an ionized gas which can be

noble gas (argon, neon, krypton and xenon) or combination of these gases.

a type of lamp where light is produced by

passing the electric current through a semiconducting material (a diode) which

emits photons (light) through the principle of “electroluminescence”. It falls under solid-state lighting (SSL) lamps.

a newer type of lamp which

produces light by cathodoluminescence where a beam of electrons is made to hit a

fluorescent phosphor surface. This type of lamp is still in is development phase to

compete with LED lamps in terms of efficiency

Visible light is the only type of

electromagnetic radiation waves we can see where wavelength ranges from around ___nm to ___ nm

It describes how much power is converted to light. It refers to the amount of lumens

produced per watt. (lumens/watt)

It describe how much power is converted to light. refers to the percentage of power that

is converted into something useful (visible light, in the case of lighting) and is usually unitless

means a semiconducting device which only

allows flow of current in one direction only.

is basically a material with both

properties of a conductor and an insulator.

considers the color rendition, color temperature, dimming ability and distribution of light so it adds to the aesthetics of a designed area.

trademarked program of U.S. Environmental

Protection Agency (EPA) and U.S. Department of Energy (DOE)

that promotes energy efficiency.

A type of glare caused by natural light.

A type of glare caused by Artificial light. reduces visibility or impairs visual performance, often accompanied by discomfort.

The immediate contiguous area in which a worker performs visual tasks (desk,

desk return, table that function as one task location, conference table shared by

several workers

The surface on which the visual task is performed and at which the

illumination is specified and measured.

A complete lighting unit consisting of a lamp or lamps, together with

parts designed to distribute the light, to position and protect the lamp(s), and to

connect the lamp(s) to a power supply; referred to as a “fixture.”

Device for redirecting the radiant energy of a lamp by reflecting it in a desired direction

Device for redirecting the radiant energy of a lamp in the desired direction

by refraction through a lens (e.g. Track Light)

The most practical method of passive solar energy utilization in commercial buildings. Reduces lighting energy use and cooling load as well. Produce levels of illumination 50 times.

Diffusers, lenses and louvers to cover bulbs from direct view to

prevent glare and distribute light

Translucent or semi-transparent (see-through) covers made of glass or plastic; bottom or sides of light fixtures to control brightness

Clear, transparent glass, plastic covers; incorporates prisms and flutes to distribute light in specific ways

Baffles that shield the bulb from view and reflect light;

can be contoured to control light and decrease brightness.

Which type of lighting system is this

Which type of lighting system is this?

Which type of lighting system is this

What type of lighting system is shown

The least efficient of all lamps (efficacies of less than 20 lumens per watt).

More efficient than incandescent lamps (20 times longer life). More light is emitted by a 40-watt fluorescent tube than by a 100-watt incandescent bulb. Shape – tubular, straight tubes.

Include mercury vapor, metal-halide, and high- and low-pressure sodium lamps High efficacy and, with appropriate color correction Utilized in almost any application, indoor or outdoor, that does not have critical color criteria

Distinctive blue-green light. Lamp life is extremely long (since the long life is predicated on their being left on for long periods of time, they are not suitable for applications that are subject to frequent switching). High mounting necessary to avoid glare and to permit adequate area

coverage. Used in street lights

Basically a mercury lamp with halides of metals, such as thallium, indium, or sodium,

added. The addition of these salts causes light to be radiated at frequencies other than

the basic mercury colors and increases efficacy. Color is much warmer than that of the mercury light. Used in Billboards

Light is a yellow-tinted color due to the sodium contained within them under high

pressure. Complementary white sources used in conjunction can make the color of this

light even more acceptable, and the most efficient light for plants

The most efficient source available, but inappropriate for general lighting because of its

distinctive deep yellow light output. Widely used for highway lighting, where the discernment of objects is the primary objective. Use for building’s exterior applications, inside warehouses, or as after-hours security lighting

Refers to a color temperature around 3000K, providing a yellowish-white light.

Denote a color temperature of around 4100 K.

designation is used specifically for T12 and other fluorescent lamps and has a color temperature of 4100k

The first countries in the world to announce plans to ban incandescent light bulbs (and to then replace them with more energy-efficient fluorescent bulbs) (2005)

is the best material as a filament for an incandescent bulb

Who made the first working sodium lamp?