MooMac_01

maciekskontakt said:

I am shocked at bad terminology on warm-cold in lighting. Daylight is 6500K and it is warm light most popular home light for night is 2700K-4500K that is actually cold. I hope everybody knows what Kelvin scale stands for. It is like saying that 32Fahrenheit is warm and 90 Fahrenheit is cold. You can use description of sharp or soft light, but when you mention warm or cold then use proper temperature scale. I see it everywhere this incorrect reference is on boxes with bulbs and now here. People skew proper terminology and then they think it is correct use because everybody else does this popular mumbling. Even f.lux got it wrong. Follow physics properly... do not create common lingo with opposite terms.

That's because it's not a physics based description, it's an art based one. What you call daylight (6500 K which actually varies and is generally closer to 5600 K) is blue. Blue is a cool color. Conversely 4200 K light is closer to yellow or orange and it considered a warm color. Sharp or soft light has nothing to do with the color temperature - it's how diffuse the light is (i.e. how hard the shadow it casts is.) This is common terminology and has been common terminology for longer than you've been alive. And in any case 2700K is hardly cold - quite the opposite in fact. You'd melt your face off with any color temperature light if you put the filament to your skin. All light is hot, so we use the color for it's description - not it's temperature. You've got it wrong.