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LED Lighting & Fixture Terms
Author: LED Lighting
Published: May 11, 2011
LED Lighting & Fixture Terms
| LED LED stands for Light Emitting Diode which consists of a specialized semiconductor chip that is energized by electricity flow between 2 conductor posts known as the anode and the cathode. Energy is released in the form of a photon. |
| Fixed Gobos (Number of) A Gobo goes between the light source and the optics in a lighting fixture and is used to control the shape of the light coming out of the fixture. Fixed Gobos have no movement other than the movement of the lighting fixture itself. Custom Gobos can be ordered and produced with a variety of shapes, logos (stamped metal logos) or color graphics (glass gobos). |
| Rotating Gobos (Number of) A Gobo goes between the light source and the optics in a lighting fixture and is used to control the shape of the light coming out of the fixture. Rotating Gobos can spin when used in conjuction with a DMX controller. Custom Gobos can be ordered and produced with a variety of shapes, logos (stamped metal logos) or color graphics (glass gobos). |
| Prism A prism is a tranparent element with angled surfaces which refract light, they can be used to reflect this light or split it into spectral components (colors of the rainbow). |
| Dichroic Colors Manufactured colored, coated glass used to generate colors in place of colored paper gel sheets. |
| Shutter One, or two flags used to block the light output of a lamp from a theatrical lighting fixture. |
| Strobe Effect Strobe is used to produce regular flashes of light that can give the appearance of an object moving in slow motion |
| Focus A focus is the mechanism which gathers the rays of light from the source and allows the light fixture operator to flatten or sharpen the output of light. |
| Number of LED's The combination of multiple LED capsules contributes to the total number of LEDs |
| Individual LED Wattage Each LED capsule has a wattage rating that is a measurement of the power required to operate each LED |
| Total Wattage The sum of each indvidual LED capsules wattage is equal to the total wattage |
| Lux @ 100% A means of measuring the light intensity, as perceived by the human eye, of light that hits or passes through a surface. |
| Lux Red A means of measuring the red light intensity, as perceived by the human eye, of light that hits or passes through a surface. |
| Lux Green A means of measuring the green light intensity, as perceived by the human eye, of light that hits or passes through a surface. |
| Lux Blue A means of measuring the blue light intensity, as perceived by the human eye, of light that hits or passes through a surface. |
| Lux White A means of measuring the white light intensity, as perceived by the human eye, of light that hits or passes through a surface. |
| Lux Amber A means of measuring the amber light intensity, as perceived by the human eye, of light that hits or passes through a surface. |
| Beam Angle The Beam Angle is the angle between the two directions opposed to each other over the beam axis for which the luminous intensity is half that of the maximum luminous intensity. ( i.e. the 50% downpoint off axis) |
| Field Angle The Field Angle is the angle between the two directions opposed to each other over the beam axis for which the luminous intensity is 10% that of the maximum luminous intensity. ( i.e. the 10% downpoint off axis) |
| Lens Option The stated beam angle is measured with that particular fixture's standard lens. An optional lens would change the beam angle, usually at an additional cost. |
| Flicker Free LED light fixtures use PMW (pulse width modulation) to dim the output by sending variable bursts of voltage to the LED node, thereby varying the output. If the speed of the PWM is not several times faster than the capture/sample rate of the video camera, the image will "flicker" because there will be times when the camera captures/samples the scene whilst the LED is "off", or between PWM voltage bursts. |
| DMX Channels DMX or Digital Multiplex is a language that allows specific functionality or groups of functionality to be manipulated by the light fixture operator. A DMX channel is one parameter of control for the operator or programmer. Multiple DMX channels increase the amount of control the operator has over parameters such as color, color mixing, strobing, and movement. |
| DMX Pin Configuration DMX connector or cable protocol calls for either 5 pin or 3 pin DMX cable. While the official DMX pin configuration is 5-pin, many manufacturers have simplified this connection with a 3 pin version that looks like a standard 2 conductor XLR audio cable. Some fixtures accept both 5 pin and 3 pin DMX pin configuration and adaptors are available to convert 3 to 5 and 5 to 3. Since DMX is a transmission of data and requires a different cable impedence, only designated "DMX" cable should be used. |
| Dimming Curve The amount of a fixture's light output directly proportional with the amount of voltage applied to said fixture |
| Binning (Color Consistency) LED nodes are matched with tight toleraces so all fixtures of that model, and/or range/family will always match color. |
| Multi Color Chip (no shadows) Multi Color Chips are LED nodes in which all three colors required for color mixing (RGB-Red, Green, Blue) are present in the same space. The result is increased space on the fixture face for larger LEDs or more quantity of LEDs. Since the color mixing happens at each LED node, the result is a more even and consistent light field with no shadows. |
| Color Temp Macro Pre-programed mixed white to equal specific color temperature measured in Kelvin degrees. Generally used to match tungstun, quartz, discharge or daylight white light. |
| IP Rating (Ingress Protection) Ingress Protection (IP) ratings are developed by the European Committee for Electro Technical Standardization. The IP rating normally has two numbers:Protection from solid objects or materials and Protection from liquids (water). Go to: http://www.engineeringtoolbox.com/ip-ingress-protection-d_452.html for a more detailed explantion. |
| Auto Sensing Power Supply The power supply will automatically work within a specified electrical a.c. range, genrally 100v-240v @ 50/60hz. |
| Sound Activated A light fixture that has a built in mic allowing it to sense bass frequencies in music and move/change colors to the beat of the music |
| Internal Programmable Memory The ability to store programs to an internal memory chip to be recalled at anytime without the use of an external DMX controller |
| Zoom The ability for a fixture to adjust the beam angle from near to far |
| Built-In Wireless DMX A fixture that can receive DMX information without DMX cable |
| Power Draw The amount of electricity the lighting fixture requires to operate |
| Power Linking (No or Edison or Power Con) The options in which a light fixture is energized. Linking refers to the ability for one fixture to draw its power by attaching to another fixture with the same ability. |
| Approval Certification awarded to a product by an outside company that notates electrical product safety testing and performance benchmarks. |
| Net Weight The actual weight of the lighting fixture without packaging |
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