Color temperature of "white" LEDs is due to the amount and type of phosphor to downconvert the blue LED spike to warmer colors. The more phosphor and conversion

Color temperature of "white" LEDs is due to the amount and type of phosphor to downconvert the blue LED spike to warmer colors. The more phosphor and conversion that goes on, the less total output (no free lunch in physics). So in markets where amount of light (like exterior lighting) is a selling point, vendors sell their cooler temperature LED's for performance.