These are just two of the many possible light sources.
Never place any light source directly in front of a television.
Here the light source is the sun moving in the sky.
This rule does not work when the light source is near.
The light source used to project the photo is what begins the process.
That is the effect of the different light sources at the store and home.
A dark area has limited light sources, making things hard to see.
The maximum possible value for any light source is 683.
Another has you moving a light source to create a certain shadow on the wall.
Then I turned, slowly, to check for any possible light sources.
He saw the pair clearly, but without any source of light, they did not see him.
A small cook fire was the only source of light.
How could he see if there were no sources of light?
Do not, however, look toward any intense source of light.
It was the only source of light in the room.
So I needed to have this huge source of light from above.
Gradually they both moved away from the single source of light.
There was no source of light, and yet he could see.
The door closed behind her, cutting off the new source of light.
No sources of light were visible, but they could still see.