User talk:Emblem777

1.GLARE PROJECTION TYPE –the intensity is focused ti the intruder while the observer or guards remains in the comparative darkness. 2.CONTROLLED LIGHTING –the width of the lighted top can be controlled and adjusted to suit the security needs

3.STAND-BY LIGHTING similar to continuous lighting but it turned manually or by special devices or other automatic means when is suspicioun of entry

4.MOVABLE LIGHTING –consist of stationary or portable.

5.EMERGENCY LIGHTING is a battery-backed lighting device that comes on automatically when a building experiences a power outage. Emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories. Most building codes require that they be installed in older buildings as well.

1. The incandescent light bulb, incandescent lamp or incandescent light globe produces light by heating a filament wire to a high temperature until it glows.

2.MERCURY VAPOR LAMPS - A mercury-vapor lamp is a gas discharge lamp that uses an electric arc through vaporized mercury to produce light 3.Metal-halide lamps, a member of the high-intensity discharge (HID) family of lamps, produce high light output for their size, making them a compact, powerful, and efficient light source. 4. A fluorescent lamp or fluorescent tube is a gas-discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short-wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light. A fluorescent lamp converts electrical power into useful light more efficiently than an incandescent lamp

5. High-pressure sodium (HPS) lamps are smaller and contain additional elements such as mercury, and produce a dark pink glow when first struck, and a pinkish orange light when warmed. Some bulbs also briefly produce a pure to bluish white light in between. This is probably from the mercury glowing before the sodium is completely warmed. 6. Low-pressure sodium (LPS) lamps have a borosilicate glass gas discharge tube (arc tube) containing solid sodium, small amount of neon, and argon gas in a Penning mixture to start the gas discharge. The discharge tube may be linear (SLI lamp) [2] or U-shaped. 7.quartz lamp - a mercury-vapor lamp that is enclosed in a quartz container instead of a glass container. FLOOD LIGHTING is an artificial light providing even illumination across a wide area.

STREET LIGHTS is a raised source of light on the edge of a road or walkway, which is turned on or lit at a certain time every night. Modern lamps may also have light-sensitive photocellsto turn them on at dusk, off at dawn, or activate automatically in dark weather. SEARCH LIGHTS (or spotlight) is an apparatus that combines a bright light source with some form of curved reflector or other optics to project a powerful beam of light of approximately parallel rays in a particular direction, usually constructed so that it can be swiveled about.