Journal

Five small changes that make a room feel warmer at night
Most of the difference between a space that feels warm at night and one that feels like a corridor comes down to decisions that take an afternoon. Five of them, with the research on why they work. Read more...
Bulb basics: kelvin, lumens and CRI explained
Bulb boxes are covered in numbers and almost none of them are explained. Three of them decide how a room will feel. Here is what each one means, with the official guidance behind it. Read more...
How to light a living room after dark
Most rooms are lit by one fitting in the middle of the ceiling. Here is the short version of how to fix that, in the order the changes actually matter, with the research behind it. Read more...