The star and the sun.(And sometimes fire and lightening)
The main source of light is the sun
The main source of light is the sun
The main source for plants is the light
A light source that "fills in" or lightens shadow areas often created by the main light source without causing the main light source to "blow out" the highlights.
The sun.
it is sun
the sun
The main energy source for a reaction is typically provided by heat, light, or electricity.
Candles have been a primary light source historically due to their portability, ease of use, and accessibility of materials for their production. Additionally, candles provide a warm and natural-looking light that can create a cozy atmosphere in a variety of settings.
Key light
-- the sun -- street lights -- auto headlights -- the light in my bathroom Note: The moon is often useful and important for getting around at night, but it is not strictly a light "source", and cannot properly be included on this list.
Key light