REFLECTORS INFLUENCE TO LUMINARY EFFICIENCY

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REFLECTORSReflectors influence to luminary efficiency

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IntroductionThis presentation describes how big is influence of reflector to the efficiency of luminaries even if these luminaries are of the same power and are equipped with the same type of lamps and

are used in identical applications.

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Lighting units compared in this study

• LUXMAY ONIX-258 2x58W T8

• ELUMA Low Bay SE-EN4/2L/50 2x50W T5

• SAULA ES-EN4/2L/50 2x50W T5

• LUMINA EL-EN4/2L/50 2x50W T5

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ConventionalONIX

• No. of Lamps: 2

• Type of Lamps: 58W T8

• Luminance of Lamps: 10400 lm

• Power consumption: 116W

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Low bay ELUMA

• No. of Lamps: 2

• Type of Lamps: 50W ECO T5

• Luminance of Lamps: 10.000 lm

• Power consumption: 103W

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SAULA• No. of Lamps: 2

• Type of Lamps: 50W ECO T5

• Luminance of Lamps: 10.000 lm

• Power consumption: 103W

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LUMINA

• No. of Lamps: 2

• Type of Lamps: 50W ECO T5

• Luminance of Lamps: 10.000 lm

• Power consumption: 103W

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All measurements were made using the same room and mounting parameters incl. number

of luminaries and distance between them.

Simulations were made using DIALux v. 4.11 and ELUMDAT files provided from the

manufacturers.

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ConventionalONIX 2x58W• Mounting height: 7 meters

• Maintenance Factor: 0.8

• Light levels achieved:Eav: 150 luxEmax: 358 lux

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Low bay ELUMA 2x54W

• Mounting height: 7 meters

• Maintenance Factor: 0.8

• Light levels achieved:Eav: 195 luxEmax: 483 lux

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SAULA2x54W• Mounting height: 7 meters

• Maintenance Factor: 0.8

• Light levels achieved:Eav: 241 luxEmax: 552 lux

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LUMINA2x54W• Mounting height: 7 meters

• Maintenance Factor: 0.8

• Light levels achieved:Eav: 252 luxEmax: 572 lux

LOR (light output radio)

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ModelConventional

low bay lighting

ELUMA Low Bay SAULA LUMINA

LOR 65 75 80 87

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Conclusion

• Reflector construction has an essential influence into lighting efficiency

• For different heights different types of luminaries must be chosen

• Light levels can differ up to 2 times if to use same power but different type fittings

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Thank you.