A sidelight in a building is a window, usually with a vertical emphasis, that flanks a door or a larger window. Sidelights are narrow, usually stationary and found immediately adjacent doorways.

Which lights are side lights?

Car sidelights, or parking lights as they are sometimes known, are usually found in the headlamp unit in the front corners of your car. Sidelights aren't as bright as headlights, so are used by drivers to make themselves visible to traffic during times when it's not dark enough for main lights.

What are side lights called?

Although they're called sidelights in the UK, in the US and Canada they're referred to as parking lights. Sidelights (or parking lights) aren't as bright as headlights. Sidelights typically use a 5W bulb, comapred to standard headlights which work on a much higher wattage.