For this reason, running signals on the ground have the red lamp at the top.

There didn't seem to be any sensible reason for that red lamp.

"So you really did use this as a red lamp in a window?"

One of the red lamps in the control panel lit up.

After just 5 minutes the red lamps lit up.

The red lamps show that all three sections are alarmed.

The people in the department were having a break, writing up their results by the light of a red lamp.

When the red lamp began to light up he reported via telecom.

If not, either the yellow or red lamp would light, depending on the level of disagreement.

A landing field will be shown by four red lamps.