1. A STRATEGY FOR LOW ENERGY LIGHTING IN CATHEDRALS Light & Design Associates

2. Light & Design Associates T TUNGSTEN: VERY LOW EFFICACY, EXCELLENT COLOUR RENDERING, VERY SHORT LAMP LIFE, DIMMABLE TUNGSTEN HALOGEN: LOW EFFICACY, EXCELLENT COLOUR RENDERING, SHORT LAMP LIFE, DIMMABLE XENON: LOW EFFICACY, EXCELLENT COLOUR RENDERING, LONG LAMP LIFE, DIMMABLE FLUORESCENT: VERY HIGH EFFICACY, GOOD COLOUR RENDERING, LONG LAMP LIFE, DIMMABLE COMPACT FLUORESCENT: VERY HIGH EFFICACY, GOOD COLOUR RENDERING, LONG LAMP LIFE, DIMMABLE COLD CATHODE: HIGH EFFICACY, GOOD COLOUR RENDERING, VERY LONG LAMP LIFE, DIMMABLE METAL HALIDE: VERY HIGH EFFICACY, GOOD COLOUR RENDERING, LONG LAMP LIFE, NON DIMMABLE SODIUM: VERY HIGH EFFICACY, POOR COLOUR RENDERING, LONG LAMP LIFE, NON DIMMABLE LED: MEDIUM EFFICACY, MEDIUM COLOUR RENDERING, VERY LONG LAMP LIFE, DIMMABLE(NON LINEAR ) LIGHT SOURCES

3. Light & Design Associates 1.CHOOSE APPROPRIATE LIGHT SOURCES FOR PARTICULAR APPLICATIONS. 2.BREAK LIGHTING SCHEME DOWN INTO LOGICAL CONTROL CHANNELS 3.INCLUDE A FULLY PROGRAMMABLE CONTROL SYSTEM 4.INCLUDE DAYLIGHT LINKING ON LARGER SCHEMES 5.TRAIN CATHEDRAL STAFF IN PROGRAMMING AND OPERATING THE CONTROL SYSTEM NOTE: THE KEY TO ENERGY CONSERVATION IS NOT IN THE REDUCTION OF THE CONNECTED LIGHTING LOAD, BUT IN THE MANAGEMENT OF THE CONTROL SYSTEM STRATEGY

4. Light & Design Associates Ripon Cathedral, Nave Cross Section

5. Light & Design Associates Ripon Cathedral, Nave

6. Light & Design Associates Ripon Cathedral

7. Light & Design Associates Salisbury Cathedral Cross Section

8. Light & Design Associates Side Aisles Salisbury Cathedral, Quire

9. Light & Design Associates Salisbury Cathedral

10. Light & Design Associates Salisbury Cathedral Energy Savings: Energy consumption, old interior lighting:(estimated) 42.5kW Energy consumption new interior lighting: 29.8kW Energy consumption, old exterior lighting: 28.0kW Energy consumption, new exterior lighting: 14.5kW Ripon Cathedral Energy Savings: Energy consumption, old interior lighting: 37.5kW Energy consumption, new interior lighting: 22.4kW

11. Light & Design Associates Salisbury Cathedral, West Front

12. Light & Design Associates