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Lighting

Lighting . By Morgan Matthews. flood. Floods have no lens and there is no control over the beam of light, but you can fit a coloured gel. They are most often used to illuminate backcloths and cycloramas. Usually 300 or 500 watt.

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Lighting

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  1. Lighting By Morgan Matthews

  2. flood • Floods have no lens and there is no control over the beam of light, but you can fit a coloured gel. They are most often used to illuminate backcloths and cycloramas. Usually 300 or 500 watt. • The model shown is a conventional flood for illuminating from above the stage. There are variants designed to be placed on the floor (in single and multiple units) to illuminate cycloramas, etc, from below

  3. fresnel • Sliding the lamp tray assembly using the knob underneath controls the beam angle. The lens has concentric rings of ridges that give a soft edged beam. A rotating Barndoor (as illustrated) can be fitted to shape the beam. Available in 500w, 650w, 1kw, 1.2kw or 2kw. • Generally only used behind the proscenium arch or on the first bar immediately in front of it as they have a wide beam angle (relative to a Profile) and tend to spill light due to the nature of the lens

  4. Pebble convex (PC) • This lantern uses a modified plano-convex lens with a pebbled effect on the flat (plano) side, to create a beam similar to the Fresnel, but with a slightly harder edge. There is a focussing knob to change the beam angle. Available in 500w, 650w, 1kw, 1.2kw or 2kw. • Often used in place of a Profile lantern if space is limited.

  5. profile • The beam angle is adjusted by moving the lens using the knob underneath. A plano-convex lens gives a sharp edged beam. Four shutters are fitted to shape the beam. Available in 500w, 650w, 1kw, 1.2kw or 2kw. A Bifocal Profile has two sets of shutters to give hard and soft edges. • Almost exclusively used in front of house positions.

  6. Parcan ... • Par Cans are not usually preferred for normal stage lighting but are often used for special effects or for lighting musicians. There is no lens or reflector in the lantern housing and the beam angle can not be changed. Instead a fixed beam parabolic reflector lamp is used. "PAR56" types are usually 300 or 500 watts, "PAR64" types are usually 500 or 1000 watts. • The lamps are available in a small number of fixed beams widths giving a narrow, medium or wide beam, relative to the distance from the stage. They can be very effective when used for backlighting

  7. And to control them ? • This desk has two control presets of 12 channels each with master faders. Each channel also has a "flash" button. The faders are usually graduated in half steps from 0 to 10. Some larger professional systems are graduated in percent.

  8. cables • The mains cables for stage use are usually round-pin 16 amp, 15 amp, or sometimes 5 amp type. These types of plugs do not contain fuses, so that however many extension cables and adaptors you use the only fuse in the circuit will be easily accessible at the dimmer pack. If conventional 13 amp mains connectors were used it would be difficult to find and replace a blown fuse.

  9. ... • Lighting desks are connected to the dimmer packs by one or more low voltage multi-pin cables.

  10. Now what were those lamps?

  11. flood

  12. fresnel

  13. Pebble convex (PC)

  14. profile

  15. Parcan ...

  16. What was your score? • 1-3 : need to learn them some more • 3-5 : almost there • 5-7 : almost got it • 7 – 10 : nerd

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