Why is it so hard to find red night lights?

When my daughter was born we suddenly needed to move around the darkened apartment at night a lot. As an amateur (very amateur :) ) astronomer I know all about how important it is to expose your eyes to nothing but red light at night to preserve your night vision - so I was always annoyed when I had nothing but white lights at night, which always killed my night vision, so I was forced to use even brighter lights to see anything, which really disturbed my wife (she got far too little sleep as it was).I looked around for red night lights, but found almost nothing, so in the end I jury-rigged some RGB LED light strips, and while they worked fairly well, they remained a rough solution (with a notably low WAF), and I was too sleep-deprived to build anything fancier.For awhile our nocturnal activities decreased, but my daughter is now four and will wake up most nights and wander into our bed - plus, we’ve moved out of the city, so we don’t even have the ambient lights from outside, and therefore it’s really dark at night. I’ve therefore started looking for night lights again, but discovered to my dismay that (where I live in Germany) the overwhelming majority of night lights are white, and usually very bright - so bright that I have to shield my eyes if I go near them after I’ve been in the dark for awhile and have night-adapted vision (ie sleeping). I’ve tried a few of the small handful of available red models, but they were universally awful. There are a few well-reviewed red models available in the US, but even there the vast majority seem to be white.Why are there so few red night lights? It appears there is significant consensus that exposure to blue or white light inhibits sleep (in addition to messing with night vision) - is this not widely known, or am I wrong on this point? Red is a trivially easy colour to make with LEDs, so is there another reason why red night lights are not more popular, especially when marketed for babies’ and childrens’ bedrooms? via /r/Parenting http://ift.tt/2kiXR66