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Matte Finish
Lamp or fixture surface finish producing a diffuse, lightly textured dull reflection.
Metal Halide
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. Created in the late 1960's for industrial use, metal halide lamps are now available in numerous sizes and configurations for commercial and residential applications. Like most HID lamps, metal halide lamps operate under high pressure and temperature, and require special fixtures to operate safely. They are also considered a "point" light source, so reflective luminaires are often required to concentrate the light for purposes of the lighting application.
Metasys®
Metasys is a building automation system developed and distributed by Johnson Controls. The Metasys system allows users to control a variety of building functions, such as air-handling systems, lighting, security and utility monitoring by way of the building’s internal network or over the Web.
For a more comprehensive overview of Metasys, visit Johnson Controls
MODBUS
Modbus Protocol is a messaging structure developed by Modicon in 1979. It is used to establish master-slave/client-server communication between intelligent devices. It is a de facto standard, truly open and the most widely used network protocol in the industrial manufacturing environment. It has been implemented by hundreds of vendors on thousands of different devices to transfer discrete/analog I/O and register data between control devices.
For a more comprehensive overview of MODBUS, visit MODBUS.org
Mogul Base
Base used on high-wattage incandescent and HID lamps.Motion Detector
Often called Occupancy Sensors, Mothion sensor control that uses passive infrared or ultrasonic detection to sense whether someone is present or not, and to turn a light on or off appropriately. Commonly used in outdoor flood or spot fixtures. “Automatic On” sensors turn lights on when presence; “Manual On” sensors require you to press a switch. Both types turn lights off automatically when they no longer sense a presence.MR Lamp
Multi-facet reflector lamp, of which the most popular is MR16. MR lamps surround a halogen capsule with a computer-designed glass, or metal reflector with many surfaces or facets. These compact lamps require a glass cover, either integral or with the fixture.
