A bedside lamp is one of those objects that earns its place every single day. It is the first light you reach for in the morning and the last one you switch off at night. Getting it right matters more than most people realise, and getting it wrong is something you notice every evening.
Here is what to consider before you buy.
Size: how tall should a bedside lamp be?
The most common mistake is choosing a lamp that is either too tall or too short for the nightstand it sits on. A bedside lamp that towers above the bed feels imposing. One that disappears below mattress level is useless for reading.
The right height depends on two things: your mattress height and your nightstand height combined. As a starting point, the bottom of the lampshade should sit roughly at shoulder height when you are sitting up in bed. For most people, that puts the shade somewhere between 35 and 65 cm from the surface of the nightstand.
If your nightstand is low, choose a taller lamp. If it is higher, a more compact lamp will do the job. The goal is to bring the light source to you, not the other way around.
Width: how wide should the shade be?
The shade should never overhang the edges of the nightstand below it. Beyond looking wrong, it becomes a practical problem: things get knocked off, or the shade catches on the wall behind it.
A shade diameter of 25 to 35 cm works well on most standard nightstands. If your nightstand is particularly narrow, lean toward a lamp with a smaller, more sculptural base and a tighter shade.
If you are not sure, browsing our bedside lamp collection is a good way to get a sense of what different proportions look like in a real space.
Light temperature: warm, neutral or cool?
Light temperature is measured in Kelvin. The lower the number, the warmer and more amber the light. The higher the number, the cooler and more blue-white it becomes.
For a bedroom, warm light is almost always the right choice. Aim for a colour temperature between 2700K and 3000K. This range feels soft, flattering and restful. It signals to your body that the day is winding down, which matters more than most people expect.
Avoid anything above 4000K in a bedroom. Cool white light is stimulating, which is exactly what you do not want in the hours before sleep.
Dimmability: worth it every time
A bedside lamp that dims is not a luxury. The ability to adjust light levels through the evening makes a genuine difference to how relaxed a bedroom feels. Bright for reading, low for winding down, off.
Check whether the lamp you are considering is compatible with a dimmer switch, or whether it has a built-in dimming function. Both work well. What matters is having the option. Our complete bedside lamp guide covers dimmer compatibility in more detail if you want to go deeper.
One lamp or two?
If you share a bed, two matching lamps on either side is the cleanest solution visually and the most practical. Each person controls their own light without disturbing the other.
If the bed is against a wall on one side, or the room is asymmetric, a single lamp positioned on the accessible side works fine. What matters is that the light reaches where you actually read or reach for things.
The right bedside lamp is one you stop noticing after a week because it simply works. Take the time to get the size, the warmth and the dimming right, and it will do exactly that.