Generally tighter beam angles are associated with spot lighting applications such as highlighting paintings or objects within a room. While this is true, you might also want to use specific beam angles when installing down lights.
For standard ceiling heights ranging from 2.3 - 3 metres we generally recommend using a broader beam angle such as a 55° or above. If you are installing down lights in a ceiling above 3 metres then you may opt for a tighter beam angle anywhere from 45° and below. By using the tighter beam angle on higher ceilings you will achieve greater light levels at sitting and reading height. If you use a broader beam angle on a higher ceiling, you may find the light will dissipate more before it reaches the areas you need.
Our D900 Classic is available in 55° and 45° options to provide the flexibility to install them at varying ceiling heights. Meanwhile our Surface and Track series products will generally be available in 36-45° beam angles to provide more control and focus.
If you are wanting some professional advice on which beam angle is best suited for your application, you can get a free lighting design and tips by emailing email@example.com.