LIGHTS - LED, MOVIE SHOOT, RR

Iss 01/25 May 2015

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CONTENTS

a Purpose (p 02) b LED Lights, In Brief c Advantages d Challenges

# REQUIREMENTS REVIEWED BY # REQUIREMENTS REVIEWED BY 01 Physical 02 Electrical 03 Structural 04 Light 05 Lighting 06 Spares 07 Servicing 08 Cost 09 Change resistance matrix 10 Indigenisation 11 Guidelines to book orders 12 Lighting for LED 13 Training 14 Others

PREPARED REVIEW - OVERALL APPD

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LIGHTS - LED, MOVIE SHOOT, RR

Iss 01/25 May 2015

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PURPOSE

PURPOSE This document is the outcome of the efforts to design and develop the new gen LED lights, meeting or exceeding the requirements of cinematographers. Also to mitigate the introduction stress to the manufacturer as well as the customers in switching over from the filament lights. Requirements on various aspects covering the above 2 purposes are compiled as below.

LIGHTS - LED, MOVIE SHOOT, RR

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BRIEF PROFILE ON LED LIGHTS

LED lights are rapidly replacing the filament lights used in all the domains, including still and movie shooting. Successful lighting depends on not only the light, but also the way the lights are used. Surely the lighting methods of LED lights are different from the methods of the filament lights. LED lights simplify the lighting methods and hence will become quickly popular.

LIGHTS - LED, MOVIE SHOOT, RR

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BRIEF PROFILE ON FILM INDUSTRY

Mostly shooting lights are hired by the shooting team. There are equipment owners who hire shooting equipment including lights. Understanding their business style, workmen culture is important to develop and introduce LED lights successfully. The equipment owners are basically financiers and they are keen on the bottom line. They would not consider any reason that could cause failures of these lights whatever be the justification by the LED manufacturers - for example, voltage fluctuations. They would expect the same level of performance from the new gen LED lights also. Hence LED lights may require an inbuilt voltage stabilizer making mistake proof operations or a warning on voltage fluctuations. The equipment handling in these leasing company (stores), in transport and at shooting floors are all managed by school dropouts and tougher/rough persons, from whom delicate handling cannot be expected. Hence transit handling, storing should be designed carefully in a single piece, preferably a suitcase, with poka yoke positioning. All similar aspects would be necessitated for the success of LED lights in the first attempt itself. A 1:1 comparison with the present heavy filament light of model xxxx by brand yyyy could unearth such hidden but essential requirements.

LIGHTS - LED, MOVIE SHOOT, RR

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REQUIREMENTS - PHYSICAL

# REQUIREMENT REPORT FOR - ASPECTS FILAMENT LED

01 Size LxBxH, mm/ft 02 Weight, kg 03 Outer frame/body To be stronger * 04 Colours * 05 Storing aid *

(box/cover/case) At stores

06 To lift and carry 07 To place - in all possible positions 08 For transit resisting jolts, vibrations 09 In

outdoors resisting

Heat up to 50 oC 10 Dust 11 Rain 12 Moisture/Humidity 13 Cold up to 15 oC 14 Dews 15 Heavy dust aandhi 16 17

# LEGEND 03 Lighting unit members are used to handle heavier lights, for which their hands and brains are tuned

to be reflexive. Sudden change to lighter lights may confuse them and could result in impact damages. The outer frame/body should be stronger to resist that handling errors. May be in the initial intro version, these can be little heavier and the lighter version can later be introduced. Alternatively, a free demo kit can be made specially heavier to address this habitual issue. Thus the sudden change to a lighter light can be intermediated with a medium weight demo kit.

04 To keep the operating/handling persons comfortable on visual feel aspects like colour. Totally different colour/s would provide a psychological shock and could develop a feeling to resist without any reason to express.

05 Should be mistake proof methods a suitcase type enabling to lift, carry, keep on outdoors and keep in racks in stores. The inside of the suitcase should be egg tray type, enabling only one right positioning of the light to ensure safer storage.

LIGHTS - LED, MOVIE SHOOT, RR

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REQUIREMENTS - ELECTRICAL

# REQUIREMENT REPORT

FILAMENT LED

01 Operating voltage, V Minimum 02 Maximum 03 Operating cycles, Hz Minimum 04 Maximum 05 Surge voltage Ability to withstand 06 Fluctuations - Ability to withstand 07 EMI interference resistance * 08 Power factor Effect of variation

# LEGEND 07 Caused by welding units, microwave oven/induction stove connected to the same power source

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REQUIREMENTS - LIGHT

# REQUIREMENT REPORT

FILAMENT LED

01 Power, lumens Luminaire efficiency, lumens/watt 02 CRI

(Colour rendering index) Range

03 Change from initial % After hours After hours 04 Continuous light 05 Colour

temperature Range K

06 Stability 07 Need for lighting gels 08 Brightness adjustment 09 Light spreadability Flood to spot 10 Warm up time, minutes * 11 Hardness of the light * 12 Life

recommended Hours

13 No. of switchings 14 Lumen

depreciation for

90 % 15 80 % 16 70 % 17 Photometric distribution 18 Power

Consumption Wattage

19 Start off current, Ampere 20 Operation on battery DC 21 Power factor

LEGEND 10 To get stable brightness 11 Hard light (producing sharp edged shadow) or soft light (producing blur edged shadow)