What is the difference between a flexible Sun Tunnel® and a rigid Sun Tunnel®?

Flexible Sun Tunnel® easily bend so it is recommended to use a flexible Sun Tunnel® when manuveuring around obstacles is required. Flexible Sun Tunnel® are ideal for shorter runs. A rigid Sun Tunnel® is recommended when there is a straight, unobstructed path from roof to ceiling. It produces a brighter white light and is excellent for long runs.