Smart switch, smart bulb or dimmer — how to choose for each light

Lighting is where most people start with a smart home, and the first question is always the same: should I change the switch, the bulb, or add a dimmer? There is no single right answer. The best choice depends on the light, who uses it and whether you can change the wiring.

Three ways to make a light smart

• A smart switch replaces the wall switch. Any bulb in the fitting then works, and the switch on the wall stays the normal way to turn the light on. It is fixed-wiring work.
• A smart bulb replaces only the bulb. Nothing else changes, which makes it easy and reversible, but the wall switch has to stay on for the bulb to respond.
• A dimmer replaces the wall switch and lets you set the brightness. The lights and their drivers must be dimmable, otherwise they can flicker or buzz.

When a smart switch is the better choice

• For ceiling lights and fixed fittings that everyone in the household uses.
• Where you want visitors and helpers to use the wall switch as they always have.
• Where one switch controls several bulbs. One switch is simpler and cheaper than several smart bulbs.

If your switch box has no neutral wire, a no-neutral switch may still work, with trade-offs. See our guide to smart switches without a neutral.

When a smart bulb is the better choice

• In a rental, or anywhere you cannot touch the wiring. See smart home when you rent.
• For a lamp where you want colour or adjustable white light.
• For a single light you want to try before committing to more.

The wall switch problem

A smart bulb only answers while its wall switch is on. If someone switches it off, the bulb disappears from your app and automations. A wireless scene button beside the switch gives people something to press instead, and leaving the switch on avoids the problem.

Check before you buy

1. How many bulbs does each switch control, and is the light dimmable?
2. Is there a neutral wire in the switch box?
3. Who is allowed to change the wiring in your home?
4. Which protocol does the device use, and does it work with your controller if the internet is down?

Common questions

Which is better, a smart switch or a smart bulb?

It depends on the light. A switch suits fixed lighting that the whole household uses, and a bulb suits places where you cannot change the switch or want colour. Many homes use both.

Can I use a smart bulb on a dimmer circuit?

Check the instructions for both the bulb and the dimmer first. Combining them can behave unpredictably, so the safest approach is to follow what the manufacturer says.

Do I need an electrician to fit a smart switch?

Replacing a wall switch is fixed-wiring work, which in Singapore should be carried out by a licensed electrical worker. See how we choose switches, dimmers and bulbs.

A simple way to start

Pick one room you use every day and decide light by light. Live with it for a few weeks before extending to the rest of the home.

Not sure what suits your lights? Tell us your rooms and switch layout and we will suggest a mix.