Wiktionary
amber light
n. (context British English) An amber-coloured traffic light indicating that vehicles should stop unless it is unsafe to do so, approximately equivalent to the yellow light in the US.
Usage examples of "amber light".
Street lamps flicker and hiss above our heads and throw their amber light like darts against the jagged shards.
Where the hive had stood there was now only an impossible tower of radiant amber light, launching itself through hurricane clouds with blinding determination, a pillar of raw but directed energy.