VELUX Support - Sun tunnels

How much daylight should I get through my sun tunnel?

It is very difficult to accurately estimate the amount of daylight that will enter your room through a sun tunnel.
This is due to a large number of variable factors such as:
  • Local weather
  • Orientation of the roof
  • Pitch of the roof
  • Size of the sun tunnel (10"/14")
  • Flexible or rigid sun tunnel
  • Length of the tunnel
  • Number of bends in the tunnel
  • Angle of each bend

For advice on how to add additional light to your sun tunnel, please click here.
  • Published / Last updated
    13/6/2025
Was this article helpful?
Share