IS 7848 : 1975 Studio spot lights for use in motion piture studios

1 Scope

1.1 This standard lays down the safety and performancerequirements of studio spot-lights for use in motion picturestudios, using tungsten filament lamps and employing a prismaticcondenser lens and reflector, and designed to provide asubstantially uniform beam, of variable divergence.

2 References

IS 2 :1960Rules for rounding off numericalvalues

IS 434 : Part 1 :1964Specification for rubber-insulatedcables:Part I With copper conductors

IS 1885 : Part XVI : Sec 1 : 1968 Electrotechnicalvocabulary: Part XVI Lighting,Section 1 General aspects.

IS 1885 : Part XXXIV :1972Electrotechnical vocabulary:Part XXXIV Cinematography.

IS 4905 :1968Methods for random sampling