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Chapter 8 Practicals and Effects

Chapter 8 Practicals and Effects. Notes taken from Gillette’s Designing with Light. Practical. An onstage working light source. Table lamp, wall sconce, oil lamp. Effect. A specialty device designed to give the appearance of being a light source Fire effect, candle, torch, lighting.

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Chapter 8 Practicals and Effects

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  1. Chapter 8Practicals and Effects Notes taken from Gillette’s Designing with Light

  2. Practical • An onstage working light source. • Table lamp, wall sconce, oil lamp

  3. Effect • A specialty device designed to give the appearance of being a light source • Fire effect, candle, torch, lighting

  4. Gas Lamp • Flicker bulb • 3-4 Watt • F-shaped lamp • Metallic screen electrodes act as igniters for neon glass in bulb which give off flickering yellow-orange light Picture from http://www.bettyschristmashouse.com/lights/images/flicker_bulb.jpg

  5. Candle • Can be distracting for audience as flames dance • May not be safe or allowed by Fire Marshall • Either 120V (controllable by dimmer) or battery powered with a hidden switch • Purchased or shop made • “C” (Christmas light) painted with amber acetate ink or covered with yellow gel lightly sanded

  6. Candle

  7. Torches • Sterno (with salt) or pyro gel • Away from scenery and costumes • Stationary • Only if permitted by Fire Marshall

  8. Torches • Stationary Torches • 120 Volt • Bunch 3 flicker bulbs together • If too many flickers substitute 3-4 Watt “C” (Christmas tree) lamp for one of the flicker bulbs • Paint with yellow or amber translucent paint • Hot glue flame colored/shaped gel outside/over lamps • Or flame colored chiffon or lightweight silk with fan

  9. Torches • Hand-carried • Battery-powered • 3 Variable-rate lamp flashers set at variable rates and intensities with one constant

  10. Fire Effects • Traditionally • Orange and yellow lamps hidden behind logs • Variation • Motor-driven, slowly rotating cylinder of crumpled aluminum to reflect the light • Add a random flicker with starters from fluorescent light fixtures with “A” household lamps

  11. Fire Effects • Reinforcements • 6 in. Fresnel, small fan, strips of variegated gel • Variegated gel – multicolored gel made in the shop from strips of color media of different hues • Fan blows gel which causes a flickering light • Usually hidden in fireplace so actors do not walk through effect

  12. Moon Effects • Moon Box • Wooden box with silhouette of desired phase of moon cut out • Inner face covered with muslin or diffusion • Cut out lined with 25-40 Watt lamps wired in parrallel • Inside of box painted to reflect light • Rigged behind cyc • Can be rigged to move

  13. Moon Effects • Moon Box

  14. Moon Effects • Moon Box

  15. Moon Effects • Gobos or projections Rosco Steel Moon Gobo 77220 Rosco Glass Gobo 82700

  16. Star Effects • Black curtain or black backdrop perforated with many little “star holes” hung in front of cyc or light reflective material

  17. Star Effects • Grain-of-wheat lamp or white LED lamp sewn or hot-glued on black cyc or sky tab • White “Christmas tree” lamps can also be used to make larger “stars” • Low-voltage lamp with transformer or wired in series

  18. Star Effects • Thin strands of fiber-optic material • Act like a light tunnel • Shine light in one end of strand and it comes out the other side which faces the audience • Attached to the back of a black backdrop • Strand mounted in front of high-intensity light source (MR-16 lamp with cold mirror and cooling fan)

  19. Lightning • Traditional • Dangerous • Striking and breaking the contacts of an arc • Works best behind windows • Not to be used

  20. Lightning • Single-flash heavy duty strobe light • Also called a strobe cannon • Oftentimes requires a reset time, before it can be fired again • May require several units to create a realistic effect

  21. Lightning • Fast rise time lamps • Time that it takes the filament to heat to full incandescence • Theatrical instruments = slow rise time • 200W household lamp = Fast rise time and high light output • Several lamps mounted inside a reflector scoop • Momentary-on switch • push button switch w/o a locking fixture • Circuit stays on only as long as the button is pushed

  22. Lightning • Moving lights • Strobe effect done with a quick moving mechanical douser

  23. Water Effect • Rippling effect • Shine ERS into a shallow container of water with reflective bottom • Make water move with fan or other jiggling device

  24. Water Effect • Moving light or Effects Head • Dual Gobo rotator • One moves clockwise, the other counter-clockwise Dual Gobo Rotator from Rosco http://www.rosco.com/us/lightingequipment/dgr.asp

  25. Ghost Load • An offstage unseen load connected to the dimmer • Usually a 500-1000W fresnel two-fered with small onstage load to provide sufficient wattage for the dimmer to operate properly • Eliminates lights glowing or flickering of low wattage light source

  26. Safety Tip • Never use liquid fuel on stage • Violates fire code • Don’t let wires and cables be a trip hazard • Run under cables, platforms, or in corners • Tape into place or cover with rugs • If using candles on stage, keep away from anything flammable, such as scenery drapes and costumes

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