I spent three months blaming my monitor for the headaches I got every evening while working. Then a friend who designs lighting fixtures asked one question: what kind of lamp are you using? I looked up, and there was my old fluorescent desk lamp, humming away, and it had been there since college.

I replaced it with a modern LED desk lamp, and the difference was noticeable within a week.

What Was Wrong With the Old Lamp

Fluorescent and cheap LED lamps can flicker faster than your eye can see. You do not perceive the flicker, but your brain does, and it works harder to process the light. That extra work shows up as eye strain and headaches, especially after hours of use.

The old lamp also had a cold, harsh color that made everything look flat.

What I Looked For in the New One

When I shopped, I checked three things:

• Flicker-free driver, which keeps the light steady
• Adjustable color temperature, so I can go warm in the evening
• Good coverage, a head that lights the whole desk instead of a spot

I ended up with a simple LED task lamp with a dimmer and a color temperature dial. It cost about thirty dollars, which felt expensive until my headaches stopped.

How I Use It Now

Here is the routine that works for me: bright, cool light during the day, warm and dim after dinner. Matching the light to the time of day keeps my eyes comfortable and honestly helps me wind down.

I also point the light so it comes over my shoulder instead of bouncing off the screen. Glare on the monitor was part of my problem all along.