

Some spaces are simply lit to the hilt, banks of overhead lights or a wall of afternoon sun pouring straight in. Your eyes feel it first, but by the afternoon you might also notice a tight forehead, a stiff neck, or a dull headache creeping in. It is easy to write those off as unrelated. Often, though, they trace back to the same bright light, and there are usually a few things you can do about it.
When light is too bright, you do not just feel it, you brace against it. You squint, and squinting tightens the muscles around your eyes, across your forehead, and often through your jaw and neck too. Do that for a minute and it is nothing. Do it, half-consciously, all day, and that low-level clench builds up. It is a big part of why harsh lighting can leave you with a tension headache and a tight neck, well beyond simply tired eyes.
For a lot of people, strong light, whether it is the flickery fluorescent kind overhead or direct sun glaring off the desk, is a genuine headache trigger. If you notice a nagging headache building on the days you are under the brightest light the longest, it may well be part of the story rather than a coincidence. It is worth knowing, because it points you at a cause you can actually change.
Light does more than let you see. Daylight during the day is genuinely good for you, lifting your mood and helping keep your body clock steady, so the aim is never to shut it out. It is more about taming the harsh blast. Bright, cool light is a strong wake-up signal, brilliant first thing and less helpful late on, and a lot of bright light into the evening can nudge your sleep later. How well you sleep tends to show up in how your body feels the next day, so the light around you quietly reaches past your eyes and into your rest too.
You do not need to work in the dark, just to take the harsh edge off. When the sun is blasting in, you could try tilting the blinds or drawing them part way to break up the glare rather than blocking the daylight completely, and sitting so the sun is not falling straight on your face or screen. Indoors, dimming the brightest overheads and using a softer lamp does the same job, as does choosing a warmer, lower light later in the day. The goal is soft, even light rather than one glaring source you are squinting against.
Every so often, unclench, let your jaw soften, drop your shoulders and look away from the screen for a moment. If your neck or jaw feels tight after a stretch under bright light, VIDA has a short guided stretch video you can follow at your own pace to release it.