Bedroom lighting should feel warm, calm, and comfortable so it supports good sleep. The right size and brightness make a big difference. Choose the fixture diameter mainly according to room area, then match modern LED performance.
Here is a practical size guide (based on traditional wattage ranges; today's LED versions use far less power for the same light output):
Under 10 m²
A diameter of about 45 cm works well. Traditional sources around 100 W are enough; a modern LED bulkhead light usually needs only 15–25 W.
10–20 m²
Choose roughly 60 cm. Traditional sources around 200 W; an equivalent LED bulkhead light typically runs at 30–40 W.
20–30 m²
Go for about 80 cm. Traditional sources: 300–400 W; a quality LED version often stays under 50–60 W.
Round bulkhead light models look clean and fit most bedrooms. Oval bulkhead light shapes can suit longer rooms better. For slightly humid spaces, an IP65 bulkhead light adds extra durability without changing the look.
Extra tips that matter:
- Prefer 2700–3000 K warm white light-it feels softer and helps the body relax.
- Check lumens rather than watts. Aim for 1,500–2,500 lm in small rooms and 2,500–4,000 lm in medium ones.
- Mount the light in the center of the ceiling and avoid direct glare on the bed.
Selecting the correct size of LED bulkhead light keeps the room bright enough without harshness and keeps energy use low.

If you need exact diameter-to-lumen data, color-temperature options, or recommendations for round or IP65 bulkhead light models with export certifications, just let me know. I can share parameter sheets and suitable product suggestions for your project.
