Retrofitting can be defined into two major categories

Lighting Advancement and Control

 

Daylighting systems alone can provide sufficient indoor lighting without using electric lighting. 

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Daylight  &  Electrical
(no light level difference)

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Daylighting only

Daylighting systems with appropriate electric lighting integration can provide sufficient indoor lighting level when there is not enough sunlight while reducing the energy usage of buildings significantly.  

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Existing

The facts for a  20 sqm office:
Installed power: 4 x 58W, 12.2 W/m2
Annual power consumption: 11.9 kWh/m2
CO2-emissions in 10 years: 1.4 t

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Waldmann with TWIN-C

The facts for a 20 sqm office:
Installed power: 254 W, 11.75 W/m2
Annual power consumption: 5.1 kWh/m2
CO2-emissions in 10 years: 0.6 t
(Reduction by 57%)

We design, evaluate and manage the lighting design of buildings that can provide sufficient indoor lighting while minimising energy consumption.  

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Lighting simulation of a sports centre before its construction

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Lighting simulation of a sports centre before its construction