I always have a watch with a backlight next to the bed. Actually, in keeping with my technical background this has been a Casio Databank calculator watch for the past 20 years more or less. If I need to know the time I just push the light button on the watch. And, if I need to perform a quick calculation in some foreign port, I can do it.
Please don't call me a geek. You can think it. Just don't say it.