If a room feels uncomfortable after dark, a brighter bulb is not always the answer. The light may be in the wrong place, too exposed or a different colour from the lamps around it. Start with the activity and the surface you need to see.

Three distinctions help when shopping: lumens describe light output, watts describe electricity use and Kelvin describes colour appearance. Treat them as separate decisions rather than looking for one number that promises a better room.

Read lumens before wattage

ENERGY STAR’s brightness guidance recommends choosing the light output you need, then comparing the wattage. A lower wattage does not automatically mean less light when comparing different lighting technologies.

Photograph the label on a bulb that already works well for you. Note its lumens, fitting and colour temperature before shopping. That gives you a reference point that is more useful than trying to remember whether the old bulb seemed strong enough.

Choose a colour that suits the space

The Australian government’s Energy Rating guide explains that lower Kelvin values appear warmer and higher values appear cooler. It gives examples spanning warm light at around 2,700K to daylight at around 5,000K.

Colour preference is personal, and the same bulb can look different beside coloured walls or another light source. If replacing several visible bulbs, try one first rather than assuming the description on the box will match your room.

Avoid confusing colour with brightness. A warm lamp can still produce substantial light, while a cool lamp is not necessarily the better choice for every task. Compare both the Kelvin and lumen values.

Put useful light where the task happens

A desk lamp can illuminate a book without asking a ceiling fitting to do the entire job. The Energy Rating guide distinguishes general lighting from task lighting for activities such as reading and work at a kitchen bench.

Before buying, move an existing lamp to the proposed position. Sit where you normally sit and check whether the shade hides the bright source from your eyes. Look for reflections on a screen or tabletop and adjust the angle.

Check the fitting, fixture limits and dimmer compatibility before replacing a bulb. Keep cables clear of walking routes and avoid stacking adapters to reach a convenient socket. For changes to fixed wiring or a damaged fitting, use a qualified electrician rather than treating the purchase as a simple bulb swap.

Keep the receipt while testing.