additionallight

noun
UK /əˈdɪʃənl laɪt/
US /əˈdɪʃənl laɪt/

Extra light that you add to make a place brighter.

The room was dark, so we turned on an additional light.


OTHER MEANINGS

2. A second source of light used to help you see better.

She used an additional light to read the small print.

3. More light added to a photo or scene.

The photographer added an additional light to brighten the model's face.

4. A light that is turned on in addition to the main one.

During the power cut, we relied on an additional light from a torch.