Sensors, timers, or an LED retrofit

An LED retrofit, a timer, and occupancy-aware dimming are three different changes to a Klang Valley carpark. LED lowers the power of a fitting that may still run all night. A timer moves a whole group on the clock. Occupancy-aware lighting dims an empty bay and raises it when someone is there. None of them is a guaranteed cut to the whole TNB bill.

What does an LED retrofit change?

Swapping a lamp or a fitting for LED can reduce watts at full output. If that fitting still sits at full output from evening until morning, the overnight hours are still fully lit. The committee has bought a lower full-output load. It has not answered an empty aisle at 2am.

Lamp-replacement rounds are maintenance. They matter when fittings fail. They are not the same line item as energy used while the deck is empty. A quote that only says “LED” has not said which of those two jobs it is.

What does a timer change?

A timer switches or steps a group at set hours. Every aisle on that circuit moves together. A busy ramp and an empty row share the same output until the clock changes. That is why committees see one zone too bright all night and another pocket too dark: the group was drawn for wiring, not for how the deck is actually used.

Timers also miss days that do not match the programme. A public holiday, a late function, or a quiet Sunday still follows yesterday’s clock unless someone edits it.

What does occupancy-aware dimming change?

Carpark Light distributes Anyi Smart. Those fittings use a chipset, Bluetooth mesh, and a gateway so lights can dim together when they are not needed, and rise when people or cars are there. The point is a usable baseline, not an off switch. Whether that leaves the deck dark is answered in does dimming leave the carpark dark.

This can sit on top of an LED fitting. The lamp type and the control are still two decisions. Doing the first does not complete the second. Option A and Option B, and what a site survey is for, are on the solution page.

How should a committee compare two quotations?

Put each quotation in one of the three rows before you compare price. A lower price on an LED swap is not a better answer to empty aisles at 2am. A timer that is cheap to set is not occupancy sensing. An occupancy proposal that never says what the baseline output is has not answered the dark-pocket question either.

• LED retrofit: watts at full output change. Hours at full output may not.
• Timer: hours change for a whole group. A single empty bay does not.
• Occupancy-aware dimming: output follows use, with a baseline that stays on.

Ask each party which row they are selling. If the answer mixes all three in one percentage, split the sentence before it goes into a minute. The percentage this site publishes is still only the public band for the building type, on the lighting-related slice, and only as an estimate.

What stays true if you do more than one?

You can replace fittings with LED and still control them. You can keep a timer as a backstop and still dim inside those hours. Doing both does not add the condo band to the office band, and it does not create a new percentage. The survey still has to see how many hours the deck is actually empty. A building that is busy until late does not get the same empty-hour story as a basement that clears after dinner.

Which one moves the lighting-related slice?

Only a site survey can say how much of the lighting load is still at full output when the deck is empty. The public bands stay the same either way: up to about 20% for a typical condo, about 15% for an office, about 5% for a mall, each on lighting-related electricity only. Estimate only, not a quotation. The condo line is explained in condo carpark electricity for JMB / MC.

A walk after midnight tells you whether full output is still on. It does not pick a winner from a brochure. That overnight pattern is overnight carpark lighting wastage. We do not rank other brands on this page, and we do not price a retrofit here. A site survey is required before any number is a proposal.