1600K Amber Light
Color temperature describes how warm or cool light looks, in kelvin. Daylight sits around the top of the scale, household warm white lower down, and 1600K lower still, close to the orange of a candle flame. Hooga's light sits at that 1600K point and stays there, with no white or neutral setting, and hooga says it is 99.94% free of blue spectrum light. That design choice follows from how sleep works. The eye's clock-setting cells are most sensitive to short-wavelength blue light, which suppresses melatonin and signals daytime; amber light carries very little of it, so reading by it late at night interferes far less with winding down. The soft orange glow is the most praised thing about this light, and one owner finds it so soothing that they fell asleep before getting far into the book. The cost is color rendering. Under amber light, reds, yellows and whites look much alike and blues and greens darken, so illustrated books, maps or color-coded notes lose most of their information.
