Technical Specifications

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The same room without windows
and with asymmetrical light tunnel
placement which can be justified in
order to secure better illumination
of a determined zone ( e.g desk with
computer) in the room. In other
instances this type of light tunnel
placement is disadvantageous.
The amount of light
The simplified light distribution shown
below the light tunnel installed in the
middle of the room without windows.
Depending on the user's necessities,
colour of walls (possible diffusion and
reflection of the light) and furniture
placement - this is a basic scheme of
light tunnel placement in a room with a
window. The placement of a light tunnel
too close to a wall opposite to a window
may diminish the overall light in the
middle zone.
The amount of light entering the room
at 10000 lux outside
The amount of light measured at the bottom outlet of diuser .
Light tunnel SRT PLUS with light transmitting rigid tube
light tunnel
type
h α* = 0° α = 30° α = 45° α = 60° α = 90°
SRT 250
0.6m 7785.0
7473.6
7084.4 6305.9 6053.6
1.2m 7742.0 7432.3 7045.2 6658.1 6020.2
1.8m 7692.0 7384.3 6999.7 6615.1 5981.3
2.4m 7685.0 7377.6 6993.4 6609.1 5975.9
3.0m 7676.0 7369.0 6985.2 6601.4 5968.9
3.6m 7653.0 7346.9 6964.2 6581.6 5951.0
4.2m 7610.0 7305.6 6925.1 6544.6 5917.5
4.8m 7595.0 7291.2 6911.5 6531.7 5905.9
5.4m 7560.0 7257.6 6879.6 6501.6 5878.7
6.0m 7520.0 7219.0 6843.2 6467.2 5847. 6
SRT 350
0.6m
7830.0
7516.8 7125.3 6733.8 6342.3
1.2m
7783.0
7471.7
7082.5
6693.4
6304.2
1.8m
7736.0
7426.6
7039.8
6653.0
6266.2
2.4m
7705.0
7396.8
7011.6
6626.3
6241.1
3.0m
7675.0
7368.0
6984.3
6600.5
6216.8
3.6m 7650.0 7344.0 6961.5 6579.0 6196.5
4.2m 7635.0 7329.6 6947.9 6566.1 6184.4
4.8m
7608.0
7303.7
6923.3
6542.9
6162.5
5.4m
7590.0
7286.4
6906.9
6527.4
6147.9
6.0m
7564.0
7261.4
6883.2
6505.0
6126.8
Light tunnel SLT PLUS with light transmitting flexible tube**
SLT 350
0.6m
7500.0
6975.0 6525.0 6000.0 5250.0
1.2m 6460.0 6007.8 5620.2 5168.0 4522.0
1.8m 5890.0 5477.7 5124.3 4712.0 4123.0
2.4m 5478.0 5094.5 4765.9 4382.4 3834.6
3.0m 4920.0 4575.6 4280.4 3936.0 3444.0
3.6m 4110.0 3822.3 3575.7 3288.0 2877.0
4.2m 3375.0 3138.8 2936.3 2700.0 2362.5
4.8m 3090.0 2873.7 2688.3 2472.0 2163.0
5.4m 2810.0 2613.3 2444.7 2248.0 19 67.0
6.0m 2500.0 2325.0 2175.0 2000.0 1750.0
SLT 550
0.6m
7650.0
7114. 5 6655.5 6120.0 5355.0
1.2m 6780.0 6305.4 5898.6 5424.0 4746.0
1.8m 6248.0 5810.6 5435.8 4998.4 4373.6
2.4m 5579.0 5188.5 4853.7 4463.2 3905.3
3.0m 5090.0 4733.7 4428.3 4072.0 3563.0
3.6m 4330.0 4026.9 3767.1 3464.0 3031.0
4.2m 3442.0 3201.1 2994.5 2753.6 2409.4
4.8m 3270.0 3041.1 2844.9 2616.0 2289.0
5.4m 3045.0 2831.9 2649.2 2436.0 2131.5
6.0m 2680.0 2492.4 2331.6 2144.0 1876.0
* roof pitch
** tests carried out for 2m long flexible tube