English 中文

Photocontrol Glossary

Suitable for outdoor street lights, corridor lights, courtyard lights and other LED lighting light controller components, to achieve sunrise bright and out of the surrounding environment, sunset around the dark environment

INVERSE RATIO:

A photocontrol with the turn-off at a lower value than the turn-on.

IRES (INFRARED ELIMINATING SYSTEM):

Ripley's (patent pending) Infrared Eliminating photocontrol. Truly and precisely cancels / eliminates the unit's reaction to infrared maintaining true accuracy. Replaces filtered units used by others.

JOULE (J):

A metric unit of work or energy, equivalent to one watt second.

LIGHT POLLUTION:

Any adverse effect of man-made light. Often used to denote urban sky glow.

LUMEN (lm):

SI unit of luminous flux. Radiometrically, it is determined from the radian power. Photometrically, it is the

luminous flux emitted within a unit solid angle (one steradian) bya  point source having a uniform luminous

intensity of one candela.

LUMINAIRE:

The more modern term for Lantern. A housing or fixture that holds a light source (lamp).

LUX (lx):

The SI unit of illuminance. One lux is one lumen per square meter.

MICROCONTROLLER (MICROPROCESSOR):

Latest technology… usually used for advanced features such as built-in timing functions, inverse ratio, etc… more expensive than electronic. Microcontrollers are electronic controls

with added computer programming.