I still use the same daylight lamp I bought in 2002, when I was finishing my master's thesis and needed to see specimen slides at odd hours. It's an old Ott-Lite, the kind with the curved neck and a bulb that takes several seconds to warm to full brightness. It has a crack in the plastic housing from when I knocked it off a shelf in 2007. The switch is held together with a strip of electrical tape.

I have tried newer lamps. I own two very good LED full-spectrum lights that cost considerably more and render colour more accurately on paper. They sit in a cupboard. Every so often I take one out, set it up, work under it for an afternoon, and then put it back. The next morning I am standing at my desk, switching on the old lamp, waiting those few seconds for the light to settle, and it feels like the work can begin.

I know this is irrational. I do not care to examine it too closely. Some things are simply part of the landscape after long enough, and to change them would be to change the room itself, not just the light.