CS117 Comfort Meets Sustainability at UK’s Ealing Hospital Case Study 20151118 ©2015 Lumileds Holding B.V. All rights reserved.

Solution

A selection of lighting fixtures, lighting controls and sensors

were chosen from Dextra plc’s Dextra Lighting, Dexeco and

Dexsor divisions to meet the needs of the hospital upgrade.

Dextra chose LEDs from Lumileds (San Jose, CA) because of

their ability to provide very high efficacy LEDs with high flux,

outstanding light quality and industry-leading reliability.

Dextra replaced the fixtures in the imperial ceiling with

bespoke recessed luminaires — a far less expensive approach

than replacing the entire suspended ceiling. The extensive

hospital upgrade included installation of 38 variations of

luminaires with different lumen outputs, optics, dimming/

sensor controls, and integral emergency packages. All

luminaires were specified at 4000K color temperature and

80 CRI, with the exception of the Opus 2, which is specified

at 4000K and 70 CRI. All of the luminaires were designed for

rapid installation and minimum interruption of work areas

using cable flex and click ceiling rose design.

In the wards, corridors, stairwells and cafeterias, custom

DEXLED recessed luminaires using LUXEON 3535L LEDs, with

imperial dimensions of 1220 x 610 mm and 610 x 610 mm,

were manufactured and installed. Due to the wide range of

lumen outputs achieved with the luminaires, fewer overall

fixtures were required than originally installed. The luminaire’s

low brightness louvers and opal polycarbonate diffusers

provided a more comfortable light for patients and staff.

LUXEON M, LUXEON 3030 2D, LUXEON T, LUXEON 3535L LEDs

In the hospital wards and elevator lobbies, custom MODLED

luminaires with LUXEON 3535L LEDs, also with imperial

dimensions, were installed in lay-in, pull-up and surface mount

configurations. The MODLED is compliant with BSEN 12464

glare limitations for visual comfort. Other luminaires used

throughout the hospital included the Graduate Surface LED

and Protec LED downlights, using Philips Fortimo DLM Flex

modules with LUXEON 3030 2D LEDs.

In the hospital’s loading bay and nursery, the IP65 rated

Avalon Wall Pack was chosen specifically for its long life and

durability in harsh and hard-to-access areas. These luminaires

utilize the Lumileds LUXEON T LEDs—high flux, high efficacy

emitters that provide over 200 lm at 100 lm/W each. These

areas also use the Dexeco ProLED luminaires powered by

LUXEON 3535L, which boast a luminaire efficacy of 91 lm/W at

constant lumen output.

Durability is also demanded of the Opus 2 LED floodlight,

which uses LUXEON M, Lumileds brightest, most uniform high

efficacy emitter. The fixture provides constant lumen output,

exceeds Energy Star lumen maintenance requirements, is IP65

rated and has a die-cast aluminum housing and toughened

glass covers.

For outdoor areas, the Amenity Plus LED luminaires with

LUXEON 3535L LEDs provide 1500 lm or 2000 lm with

light output ratios of 80%, matching the performance of

fluorescent sources at a fraction of the energy cost.

Benefits and Results

Ealing Hospital officials determined that the LED lighting

upgrade reduced energy use by approximately 50%. The

complete upgrade was performed in 12 months. Return on

investment is estimated to be reached in 5 years. All waste

products were disposed of in line with WEEE legislation.

The LED upgrade provided the hospital with the opportunity

to balance quality with cost-effectiveness. Rigorous

compliance to the UK’s current legislation and energy

efficiency and safety standards ensured that the new

installation would operate in alignment with the Trust’s

performance goals and environmental policies.