I pay attention to colour temperature. Lights at home are usually lighten during evening, so it should be not more then 3000K - (for melatonin). I use mostly 27

I pay attention to colour temperature. Lights at home are usually lighten during evening, so it should be not more then 3000K - (for melatonin). I use mostly 2700K, tried even 2000K but that was too reddish for my taste. Keep in mind that after sunset in nature there is only moon light that has blue spectrum. Fire, as light source is about 1700K.