One person's response to light can be far different than anothers'. I just wanted to post other possible problems misidentified as eyestrain. Here's a spectrum comparison of a 2800 K LED with daylight. If you have glass bulbs or coated bulbs, or wear glasses, the UV is filtered out. Older LED bulbs did leak UV, more and more as they age, but more modern ones have a coating on the LEDs that lasts far longer to block the UV. I don't react to the warm ones in any negative way, but that doesn't mean someone else won't react badly.Tom , no matter Kelvin you purchace , the actual graphs showing the output of the colour range is horrible .
The majority of the light they emit is blue, and very little red