Yes, but most of the saving comes from switching to LEDs, not from the smart controls. The Energy Saving Trust says replacing halogen bulbs with LEDs saves about £45 a year in Great Britain. Smart dimming, scheduling and occupancy sensing then trim further, mainly by switching off lights nobody is using.
Where the energy saving really comes from
The big step is the lamp itself. The Energy Saving Trust says LEDs use about 80% less electricity than halogen bulbs for the same brightness, and can last up to 20 times longer in many cases. A house full of halogen downlights is where the largest saving sits.
Smart control is a second, smaller layer. It does not make a lamp more efficient. It changes how long the lamp is on and how hard it is working. That is why a smart lighting system on top of old halogens is a poor way to save money, while a smart system on top of good LEDs can quietly add to the saving.
Does dimming a light save energy?
Generally, yes. An LED driven at lower output draws less power, so dimming to a lower level uses less electricity. The saving is not perfectly proportional, because the driver inside the fitting still draws some power at any level, as this general guide to dimming explains. Treat any exact percentage as an estimate, because it depends on the fitting and the dimmer.
The practical point is that most people already dim in the evening. A system that makes dimming effortless is more likely to be used than a wall dimmer people forget about. Our guide to planning lighting scenes room by room shows how that works in practice.
What else in a smart system cuts waste?
Beyond dimming, three features do most of the work:
- Scenes. One button sets a whole room, and an “All off” scene at the front door or bedside catches lights left on upstairs.
- Schedules. Lights in utility rooms, hallways and outside spaces can turn off at set times, so they are not left on all night.
- Occupancy sensing. Lights in cupboards, plant rooms, garages and guest bathrooms can switch off when nobody is there.
These are the places where waste happens, because nobody is looking at those lights. They also help with security and convenience, so the energy saving is a side benefit rather than the reason to do it.
Does smart lighting use energy when it is off?
Yes. Any connected device uses a small amount of standby power to stay ready for a command. In a well-designed system that is a minor load compared with the lighting it controls, but it is real, and it is one reason we do not put smart controls on lights that do not need them. A sensible design is selective: control where it earns its keep, and keep simple switching elsewhere.
When smart lighting will not pay for itself
It is worth being straight about this. If your only goal is a lower electricity bill, swapping remaining halogens for LEDs is the cheapest route by a long way. A full lighting control system is an investment in comfort, atmosphere, security and how the house works day to day. The energy saving helps, but it should not be the main reason to buy.
Where it makes strong sense is a larger home, or a renovation or new build where the cabling is being done anyway, because the controls cost far less to add at that stage. Our guide to LED flicker and buzz on dimmers also explains why the dimmer and the LED need to be matched properly, which affects how well any of this works.
How we approach it at Art of Integration
We are specialists in Lutron lighting control, and we integrate lighting with Control4 so scenes, schedules and sensors work with the rest of the house. Our smart home lighting and shading page explains the options. You can see how a whole-house system comes together in our Hampstead project, where lighting is integrated into Control4.
The honest conversation we have with clients is: use efficient LEDs everywhere, add control where it improves the way you live, and do not expect the lighting to pay for itself in bill savings alone.
Frequently asked questions
Does smart lighting save money?
It can, mainly because it usually comes with LEDs and because it switches off lights that are not needed. The Energy Saving Trust figure of about £45 a year relates to replacing halogens with LEDs, so most of the saving is from the bulbs rather than the controls.
Are LED lights cheaper to run than halogen?
Yes. The Energy Saving Trust says LEDs use about 80% less electricity than halogen bulbs for the same brightness.
Does dimming an LED reduce the electricity it uses?
In general it does, though not in perfect proportion, as the driver still draws some power. The exact saving depends on the fitting and dimmer.
Is it worth adding smart control to an existing home?
It can be, particularly if you are renovating. If you want to talk it through, visit our showroom in Walton-on-Thames or contact us.
