Brightness is measured in lumens
Wattage tells you how much electricity a bulb uses; lumens describe its light output. Two bulbs with the same wattage can produce different brightness, so compare the published lumen figure before buying.
Start with the room’s purpose
Relaxed bedrooms and lounges usually need softer, layered light. Kitchens, study areas and workspaces need stronger task lighting. Corridors and night-use areas can use lower-output bulbs when safe movement is the main requirement.
Use more than one light in larger rooms
One high-output bulb can create glare and dark corners. Multiple well-positioned lights often provide more even illumination. Consider ceiling height, wall colour, shades and natural daylight when planning the total output.
Typical BandeviElectronics choices
A 5W bulb can suit low-level or night lighting; 9W is a practical everyday starting point; 12W or 15W may suit larger rooms or brighter task areas. These are starting points, not a substitute for a room-specific lighting calculation.
Check the fitting and voltage conditions
Confirm B22, E27 or another cap type before ordering. In locations with voltage variation, prioritise stated surge protection and use safe wiring installed by a qualified person.
Frequently asked questions.
Is a 9W LED bulb enough for a bedroom?
It can be a practical starting point for a modest bedroom, but the correct choice depends on room size, wall colour, ceiling height, shade design and whether other lights are present.
Should I compare watts or lumens?
Use lumens to compare brightness and watts to compare electricity use.
Can one large bulb replace several smaller bulbs?
It may provide enough total output, but several well-positioned sources often give more even light with less glare.