Page 31 - Property Sustainability Report 2015

After comparing di erent lighting options, we decided to replace the old lamps with highly‐e cient metal halide lamps that allow us to use fewer bulbs achieving up to 25% improvement in lighting e ciency for both racecourses. For a seamless transition, we installed the new lighting systems between race meetings and during the o -season. We preserved and reused existing light masts and their foundations to avoid creating large amounts of waste.
The new lighting systems enable greater control over the light beam through which we can reduce the impact of light pollution on neighbouring communities. We assessed the levels of light nuisance after the installation, and there is a 50‐80% improvement.
Before the retro t, the neighbouring buildings were heavily a ected by the HVRC oodlights.
After the retro t, there was a 50% reduction in light pollution.
Before the retro t, the buildings
on the opposite banks of the Shing Mun River were heavily a ected by the STRC oodlights.
After the retro t, there was an 80% reduction in light pollution.
LIGHT POLLUTION IMPROVEMENT RESULTS
Operation
STRC Morning Track Works STRC Racing Mode
HVRC Racing Mode
Property is the rst to introduce an Active Reactor controller for lighting systems in Hong Kong. This device varies power levels to compensate for performance depreciation in high wattage metal halide lamps. The Active Reactor begins with a lower than rated power for new lamps and gradually increases to full power as lamps age. This device extends lamp life and can lower the energy consumption of track lighting systems by at least 15%. It also acts as a dimmer when strong illumination is not required such as periods between races and early morning training. The replacement project was completed in late 2014.
Reference
Limit
2 lux 25 lux 25 lux
Measurement Records against the Façade of Most Sensitive Receiver
Old System
New System
Improvement
7.2 lux
1.3 lux
≥ 80%
22.8 lux
16.5 lux
~ 28%
21-59 lux
10-13 lux
≥ 50%
Preliminary evaluations of the performance of the new lighting systems at both the HVRC and STRC present encouraging results:
COMPARISON OF OLD AND NEW LAMP ARRANGEMENT (RACE MODE)
No. of Lamps
Overall Power
Power Reduction
- 35% - 22%
869
1.7MW
548
1.1MW
1769
3.5MW
1414
2.7MW
HVRC Old Scheme HVRC New Scheme STRC Old Scheme STRC New Scheme
Lamp Arrangement
Old scheme
The Hong Kong Jockey Club – Property Sustainability Report 2015
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New scheme
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