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How to calculate the optical power of a led?
Only a small portion of light that is emitted from the LED reaches the active area of the DSC. However, the intensity of the incident light – from now on referred to as optical power P in – is needed in order to calculate the efficiency h of the DSC (see also equation 2). P max is the power maximum of a DSC at constant light intensity.
How to calculate the total RGB LED power draw?
We advise you to consult your motherboard manual for details on specific headers. For example, a single 3A 12V RGB LED motherboard header on ASUS Rampage VI could power 10 EK-Vardar 120ER RGB fans, an R6E RGB monoblock, RGB GPU block, an RGB reservoir safely and still have power left over for an additional LED strip of ~1m length.
How is the amount of current measured in a photodiode?
The amount of current depends on the light power as well as wavelength of the incident light. This relationship is called responsivity (R PD ). It is generally measured under short‑circuit conditions (0 V) and is typically indicated in the data sheet of a photodiode.
How to calculate the optical power of a DSc?
P max is the power maximum of a DSC at constant light intensity. This parameter can be obtained from I‑V curves. A photodiode can be used to calculate the optical power P in of light. Similar to DSCs, photodiodes generate current when light shines on them.
How is the efficiency of an LED light bulb?
But for a given LED light bulb you could make an estimate as often the amount of power needed by an incandescent light (with a similar amount of light output) is printed on the box. According to Wikipedia the average efficiency of an incandescent light bulb is 2.2 %.
What kind of light distribution does a led have?
A LED’s light distribution is called Lambertian and the formula is available online. You would need to assume your power meter is calibrated and that it performs well over its known area surface.