Google ngrams might help you investigate this further. The dates of the two World Wars would give you a frame of reference. Although war is almost continuous around the world, the physical presence of war (ie occupation, fighting on the beaches, rationing, nightly bombing, basically death or hardship in the local vicinity due to war) is relatively rare in English speaking (or rather, publishing) countries in modern times. You might be able to find other languages for which this is more definitely the case, but that would be off topic here.
A quick search for "kill the light" shows no significant trend (slightly upwards) from 1912-1920 but a reasonable peak in usage 1920-1926. Similarly, 1937-1943 shows near constant usage but an upwards trend from 1943 on to 1948.
From this small example, we can see that the world wars didn’t decrease the usage of "kill the light" in English publications. It’s a fairly big topic, though and you’d need more examples than this to draw a definitive conclusion.