Disability glare causes discomfort and impairs the vision in comparison to discomfort glare. It is an effect caused by inter-reflections within the eyeball and causes a sense of pain and even a headache. The sense of vision is reduced by disability glare and can be both caused by direct or reflected light.

Tip from a lighting designer

We as lighting consultants, plan lighting arrangements that are balanced and take both glare and contrast into account.

Discomfort glare is the glare caused by a light source without necessarily impairing vision in comparison to disability glare. Discomfort glare can be caused by direct or reflected light and high-contrasts in comparison to the surrounding. An example of this is a bright spotlight on the ceiling when working on a computer screen. The user of the space will still be able to see their surroundings, however, the presence of the bright light source in their field of vision, causes discomfort and distraction.

Dim to warm or also called warm dim is the characteristic of a light source, mainly LED to change its colour temperature (link) to change when being dimmed down.

Dynamic white lighting or also called “tunable white” is one of the technical advantages of LED lighting. In contrast to conventional lighting sources, a dynamic white light source, often an LED strip or COB can vary its light colour from daylight-like cold white to candle-like warm white, e.g. 2700K white lighting.

Digital Addressable Lighting Interface (DALI) is a trademark for network-based products that control lighting. The underlying technology was established by a consortium of lighting equipment manufacturers as a successor to 1-10 V lighting systems, and as an open standard alternative to several proprietary protocols.