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I've seen fire alarms that use very bright, flashing lights. Those might very well wake someone up from a dead sleep, but I'm not sure what the research says o
by pmiller2 6y ago
I've seen fire alarms that use very bright, flashing lights. Those might very well wake someone up from a dead sleep, but I'm not sure what the research says on them.
- jagger27 6y agoAs someone who slept under one that would start flashing just before the sound started, oh yes, the light alone can wake you up. It's like a flash of lightning, or at least a really bright camera flash.