Being able to go from a computer with f.lux to my iPhone with f.lux will play much nicer with my eyes at night. I can literally feel the strain in my eyes when going from f.lux to no f.lux.

http://thenextweb.com/lifehacks/2014/04/23/7-things-can-righ..., "Blue light is able to pass through what is called the retinohypothalamic tract, or pathway. This pathway is responsible for regulating our circadian rhythm and a number of other biological and behavioral processes."

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831986/, "Hastings and Sweeney’s paper, published in the December 1958 Biological Bulletin, gathered dust for decades. No one thought these findings might hold any relevance for humans, whose circadian rhythms were then widely believed to be relatively insensitive to light. But scientific discoveries in the past two decades have changed all that."

https://theconversation.com/a-dark-night-is-good-for-your-he..., "In the last decade or two it has become clear that the genes which control the endogenous circadian rhythm (the “clock genes”) also control a large part of our entire genome including genes for metabolism (how we process the food we eat), DNA damage response (how we are protected from toxic chemicals and radiation), and cell cycle regulation and hormone production (how our cells and tissues grow)."

There is room lighting with low-blue content, e.g. the G.E. Align PM bulb, http://www.amazon.com/gp/product/B00PLR3M0M & https://gigaom.com/2014/09/01/what-is-the-blue-light-from-ou..., "It remains unclear whether our screens themselves will soon emit less blue light — Hansler is pessimistic because he says that changing the amount of blue light will be like admitting that the screens are causing health problems, and lawsuits could ensue."

You don't need to talk of it as a health problem. Just say it makes it kinder on the eyes.