Natural light and metabolism

I’ve noticed that it’s difficult for me to feel warm while at work. My hands especially seem to always be cold here, seemingly regardless of what I’m eating, be it tons of sugar, salt, good protein, very little plain water, etc. My job isn’t particularly stressful, though at times I can get busy and rushed, but most of the time I’m just sitting at my desk working at a computer. After I go home from work, or on the weekends, I notice my hands are typically much warmer and more vascular.

Recently, two events made me think. I had a midday meeting in a break room at work that has a giant skylight, and I worked from home one day, in our home office by a window. Both times, I was doing what I typically do at work- sit at a computer. But both times I noticed my hands were much warmer almost immediately, with veins popping out and whatnot.

Normally, it is nothing but fluorescent lights and CRT monitors at my work. For these two events, there was actually lots of natural light. The ambient temperature would have been maybe a couple degrees warmer those two times, compared to my work office, by I wasn’t sure if such a slight difference would account for that.

When I’m not at work, our house just has incandescent bulbs, or I’m outside, and I typically don’t notice cold hands then, especially if the sun is out.

Could it be that the stuff Peat mentions about light and metabolism is true? Blue light=bad; red light=good? Anyone notice anything similar? I’m going to start experimenting. I’m sure there are other confounding factors, but the type of light seemed to stand out to me.