Lights are entities that emit light. The light affects all materials except those using the flat shader.

Lights can be positioned as with any other entity.

By default, A-Frame scenes inject default lighting, an ambient light and a directional light. These default lights are visible in the DOM with the data-aframe-default-light attribute. Whenever any lights are added, the default lights are removed from the scene.

A new light entity will use the directional type by default, other options are:

Each of these light types can have their color and intensity specified. The hemisphere, point and spot lights have additional properties.

  light="color: #AFA; intensity: 1.5"
  position="-1 1 0"

Further reading: