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2. Ultra-high-performance lamp - Wikipedia

   en.wikipedia.org/wiki/Ultra-high-performance_lamp

   Ultra-high-performance lamp. An ultra-high-performance lamp, often known by the Philips trademark UHP, is a high-pressure mercury arc lamp. [1] These were originally known as ultra-high-pressure lamps, [2] [3] because the internal pressure can rise to as much as 200 atmospheres when the lamp reaches its operating temperature.

3. Overhead projector - Wikipedia

   en.wikipedia.org/wiki/Overhead_projector

   In contrast, a modern LCD or DLP projector often uses an Ultra-high-performance lamp which has a higher luminous efficacy and lasts for thousands of hours. [5] A drawback of that technology is the warm up time required for such lamps. Older overhead projectors used a tubular quartz bulb which was mounted above a bowl-shaped polished reflector.

4. High-intensity discharge lamp - Wikipedia

   en.wikipedia.org/wiki/High-intensity_discharge_lamp

   15 kW xenon short-arc lamp used in IMAX projectors. High-intensity discharge lamps (HID lamps) are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube. [1]

5. Liquid light show - Wikipedia

   en.wikipedia.org/wiki/Liquid_light_show

   Light from a liquid light show, being projected behind a guitarist Layers of colored mineral oil and alcohol move over the projector lens and produce changing color patterns. Liquid light shows (or psychedelic light shows ) [ not verified in body ] are a form of light art that surfaced in the early 1960s as accompaniment to electronic music and ...

6. Parabolic aluminized reflector - Wikipedia

   en.wikipedia.org/wiki/Parabolic_aluminized_reflector

   For example, a PAR16 lamp is approximately 2 inches or 50.8 mm in diameter. [1] The size of rectangular PAR lamps is expressed as the letters REC followed by the reflector's mouth height, the letter "X", and the reflector's mouth width—with both dimensions in millimeters. For example, REC142X200 lamps are 142 high and 200 mm wide. [2] [3]

7. Magic lantern - Wikipedia

   en.wikipedia.org/wiki/Magic_lantern

   The magic lantern used a concave mirror behind a light source to direct the light through a small rectangular sheet of glass—a "lantern slide" that bore the image—and onward into a lens at the front of the apparatus.