Godsday, 18th Planting

While stealing some time to work on Nystul's Werelight in ongoing attempts to crack that spell I have happened upon a curious hue. Owing to the season and hibernation of fireflies, I have been forced to substitute components. The curious dim red hue I have been able to generate with rose quartz or vermillion has a unique quality which I must explore; it does not interfere with (ordinary human sailor) night vision. It may be ideal to light a ship's cabin at night, particularly for those who must frequent the weather deck (as must captains, navigators, midshipmen and the like). I have observed the light is dim and does not travel very far lighting only a small work area, and it lasts for quite some time, longer with the cheap abundant quartz than with the expensive vermillion. I must consult a demi-human to see what affects the light might have on their night vision, I suspect it would be either invisible to them, or perhaps the opposite - be a bright beacon that might extend their vision...knowing this I could plan appropriate precautions when working with demi-humans or against similarly sighted humanoid monsters. Churchill has said that he can see the light but not the hue, I do not understand his sighting but believe him to be near color blind (are all cats?). In any case, this limit to vision has not been conveyed to me along with my familiars other sensory powers.