Common illume term

Luminous flux: Symbols Φ, unit: lumens Lm, explains the amount of light issued by Lm emanations per second, namely the sum total of luminous flux.

The light intensity: Symbol I, unit: candle (cd), explains the lighting flux is measured in lumens, the unit of light intensity will be the lumen from a Stereo Angle.

Illumination: Symbol E, unit: lux Lm/m2, explains the flux of the emanations illuminate on the irradiated surface per unit area.

Brightness: Symbol L, unit: mcd or CD/m2, explains the lighting flux is measured in lumens, the unit of light intensity will be the lumen from per unit Stereo area.

Luminous Efficacy: Unit: each watt lumens Lm/w, explains the ability of electric light source converts electric power into light, represents by the luminous flux divided by the power consumption.

The average life expectancy: Unit: hour, explains the number of hours that a batch of bulb hours damage to 50 percent.

Economic life: Unit: hour, explains in considering the bulb of damage and beam output attenuation state, its comprehensive beam output reduce to a specific number of hours. This proportion for outdoor light source is 70 percent, for indoor illuminant such as fluorescent lamp is eighty percent.

Color temperature: Light color of light emits is the same with the radiation light hue by the bold in a certain temperature, the temperature of the bold temperature is called the color temperature of this light source.   Illuminant color temperature is different, light color is different too. Color temperature below 3300K has sedate atmosphere, warm feeling; Color temperature at 3000-5000K is middle color temperature, has blissful feeling; Color temperature above 5000K has cold feeling. Different source of different light color composes optimal environment.

As the chart below

Color warm	Light color	Atmosphere effect
> 5000K	cool and refreshing (with blue white)	cold atmosphere
3300-5000K	intermediate (white)	frank atmosphere
< 3300K	warm (with red white)	sedate atmosphere

A. color temperature and brightness
Under high temperature source color, if brightness is not high will gives people a bleak atmosphere; under low temperature source color, high brightness source illuminate will give people a sultry feeling.
B. light color contrast
In the same space to use two kinds light sources with big different light colors, the contrast will appear hierarchy effect. If the contrast is big, when it obtains the brightness levels, they also can obtain light color level at the same time.
Color rendering: Effect of an illuminant on the color appearance of objects by conscious or subconscious comparison with their color appearance under a benchmark light (sun light).
Color rendering have two kinds
Faithful color rendering: this can use high color rendering index (Ra) light source to correctly shows the substance originally color, this number is nearly 100, color rendering is best.
Effect color rendering: it wants to explicitly emphasize specific color, show the beautiful life can use additive color method to strengthen color rendering effect.
Using low color temperature source to illuminate can make red colored brighter; using middle color temperature source to illuminate can make the blue color with cool and refreshing feeling; using high temperature source color to illuminate, the object has a cold feeling

LED lamp installation method
Led lamp is the necessary equipments in KTV, bars and other evening places, not only can play the role of lighting, more important is to be able to foil an evening atmosphere. LED strip because of light, thin, soft, long life and safety, gradually have an important position in the decoration profession.
LED strip is used for interior decoration, and it does no suffer from wind and rain, so the installation is very simple. Some LED strips’ backs have self-adhesive 3M two-side tape. When in installation, you can directly tear the surface of the 3M double-sided adhesive tape, and then fixed the LED strip with hand press to be flat in the place you need. LED strip composes by many groups, which make up of 3 LEDs a group, in the circuit structure of serial-parallel mode. Every 3 LED can be cut to use alone, so the problems for some parts which in corner or the strip is too long can solve.
Controller connection mode: LED scrolling belt and RGB LED strip requires using controller to achieve the effect of irregular change. Each controller controls different distance, generally speaking, simple controller controls the distance for 10 to 15 meters, remote controller controls the distance for 15 to 20 meters, and the longest distance can reach to 30 meters. If the distance of the LED strip is too long, and the controller can't control so long distance, then we need to use power amplifier for points connected.
Attention for the connection distance of LED strip: generally speaking, the longest connection distance for 3528 series of LED strips is 20 meters, and the longest connection with distance for 5050 series of LED strips is 15 meters. If beyond this connection distance, the LED strips will easily get hot, and then will affect LED strips’ life time. Consequently, the installation must be according to the manufacturers’ requirements, don't let LED strips over the load operation