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Fun with UHP
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It's always fun playing with UHP lamps. Their extremely bright arc enables the projection of a very tight and intense light beam. Here I was running the finished version of that sky beamer, which is built around a Philips UHP 200W 1.0 that features a collimating parabolic mirror. Although such lamp was designed for video projection applications, it is very effective as a pin-spot/follow-spot/sky-tracker/search light. Here I'm using it to light the surrounding landscape at night, we could even spot some wildlife (foxes) in the distance (their eyes are incredibly effective at reflecting light, a trait evolved for a better vision at night). To give a sense of scale, the pole visible on the right is exactly 295 meters away (checked with Google Maps). This projector is also a very effective bug magnet (see their flying patterns in the beam) due to the high blue and UV-A content of its light.
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