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Stage Lights.

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Are these blue stage lights L.E.Ds?

https://www.youtube.com/watch?v=dwaxWoJPUC0


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    LEDS have several problems for this kind of lighting. They often have lamps of 575W or 1.2kW and the source size is very important. The efficiency of HMI (HID) lamps is about 100lm/W so similar to LEDS but the source size is only a few mm, which is necessary to design the complex optical arrangements efficiently, for example to give a tiny beam diameter.
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    LEDS have several problems for this kind of lighting. They often have lamps of 575W or 1.2kW and the source size is very important. The efficiency of HMI (HID) lamps is about 100lm/W so similar to LEDS but the source size is only a few mm, which is necessary to design the complex optical arrangements efficiently, for example to give a tiny beam diameter.
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