I bought one of these “natural daylight” 5,000K LED bulbs at Lowe’s:
They say they’re 40-watt equivalent, but my estimate is they’re more like 60 watts, using only 7.5 watts, and lasting for an estimated 25,000 hours!
With my colorimeter (for my monitor), it tested about the same output as the less expensive, but short life, CFL version that is supposed to be 60W equivalent. And they both did test at about 5,000K. Daylight is about 5,500K.
This puts out beautifully, refreshing (Alaska doesn’t get much sun right now) light that really is anti-fatiguing.
I highly recommend these! 5,000K is much preferable to the 3,200K and less, more yellowish bulbs that are most common. This has enough blue light to definitely feel the difference during our short daylight, winter days.