How much light will a Skytube give me?
To try to answer that question we have prepared a graph that shows lux levels obtained from a selection of common wattage electric lights and a Skytube on days with different amounts of sunshine. This gives you a means of judging whether a Skytube is the answer to your lighting needs by enabling you to compare its performance against a standard electric light.
Measurement Particulars: |
Please note these points: |
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Measurements made at 5G Miro Place, Albany, Auckland, New Zealand
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Room size 2.0m by 2.4m with a stud of 2.4m. The walls are painted light cream, ceiling white and the floor aqua.
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Skytube 0.8m long, and has been installed for approximately 6 months.
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Readings taken directly below the light source with an EMTEK LX - 101 light metre positioned 900mm above the floor.
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Weather on the 20th August was overcast in the morning and sunny in the afternoon. While the 13th November was variably cloudy & clear.
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- These Lux readings are a measurement of light intensity not
total luminance.
- There is a difference in the spread pattern of light from a standard electric light suspended below the ceiling and that of a down light recessed into the ceiling. The pattern of light from a Skytube is more like that of a wide angle down light.
- These readings are not intended for the comparison of performance of different tubular skylights as they are not under controlled conditions, nor are they a guarantee of performance in any particular installation.
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Improving natural light within your home - natural, economic and environmentally friendly