Performing Arts Gear: Ellipsoidal Reflector Spotlight (ERS)
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The Role of Lighting in Theatre | Donald Holder | TEDxBeaconStreet
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Ellipsoidal (ERS) Tutorial
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How to 'bench focus' a Source Four ERS
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Ingenious Construction Workers That Are at Another Level
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Woodturning Beautiful Walnut Resin Bowl
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Elation Professional WW Profile Ellipsoidal Light
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The Lighting Design Process
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