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Your present position:>>Technical Support
F.A.Q. |
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 What is LED? |
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A lighting-emitting diode (LED) is a semiconductor device that emits incoherent narrow-spectrum light when electrically biased in the forward direction of p-n junction. The color of the emitted light depends on the composition and condition of the semiconducting material used, and can be infrared, visible, or near-ultraviolet. |
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| What is High Power LED? |
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High Power LED refers to a type of LED with a driving current of 350mA and above. Edison Opto design and manufacture high power LED ranging from 1 Watt to 100 Watt. |
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| What is Bin Ranks? |
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Edison Opto LEDs are sorted into different bins (groups) based on their wavelength, photometric luminous flux, or radiometric power data. Bin ranks describe the specifications of the given bins. |
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| What is forward voltage (Vf)? |
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Forward voltage (Vf) is the voltage across a diode for a given forward current. |
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| What is Lumens? |
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Lumens in an international unit that refers to the amount of light that a light source produces. For example, a 60 Watt incandescent lamp provides about 800 lumens. A 1 Watt Edison Opto LED provides 85 lumens and up. |
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| What is phosphor? |
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Phosphor is an inorganic chemical compound processed into a powder and deposited inside the dome of an LED packaging. Phosphors are designed to convert the wavelength of light. Edison Opto LEDs use proprietary phosphors from the global leading company. |
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| What is junction temperature? |
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A p-n junction is formed by combing N-type and P-type semiconductors together in a very close contact. The term junction refers to the region where the two types of semiconductor meet. The junction temperature refers to the temperature measured at p-n junction, which is also the core of an LED. |
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| What is emission angle (2θ½)? |
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The emission angle refers to as the 2θ½ indicates how focused the light is when emitted from the LED. This angle is determined by measuring the angle from direct on-axis to the angle where light intensity falls to half of the on-axis intensity, and multiplying this difference by 2. The choice of viewing angle also affects the LED output intensity. Edison Opto LEDs are available in various emission angles. |
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| What is wavelength (λd)? |
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Light could be split into many colors. The colors produced by light are arranged in a precise array or spectrum. The order of color is constant, and each color has a unique signature identifying its location in the spectrum. The signature of color is the wavelength of light. |
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| Why use LEDs for lighting? |
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- Long life time (50,000 to 100,000 hrs)
- Highly energy efficient.
- Environmentally friendly – no hazardous materials.
- No infrared or ultraviolet in beam output.
- Cold start capable down to -40℃
- Vivid saturated colors without filters.
- Small form factors for improved design flexibility
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| What applications can LED be used for? |
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- Architecture Lighting
- Entertainment Lighting
- Commercial Lighting
- Residential Lighting
- Emergency Lighting
- Street Lighting
- Refrigeration Lighting
- Automotive Lighting
- LCD Display Backlight
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