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VELUX Support - Sun tunnels

How much daylight can I expect from my sun tunnel?

Estimating the exact amount of daylight a sun tunnel will bring into your room is challenging, as it depends on many factors, including:
  • Local weather conditions
  • Roof orientation (e.g. north, south)
  • Roof pitch
  • Sun tunnel size (10" or 14")
  • Type of tunnel (flexible or rigid)
  • Tunnel length
  • Number and angle of bends in the tunnel

However, to give you a general idea:
A VELUX Sun Tunnel 0K14 (14"), installed under average conditions — south-facing roof, rigid tunnel, 45° pitch, 1.5 m length, and good weather — typically delivers light comparable to a 60W bulb.
  • Published / Last updated
    08/01/2026
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