LED bulbs: units per month in Pakistan
Short answer. A 12 watt LED running six hours a day uses about 0.072 units daily and just over 2 units a month. Twelve of them across a house is roughly 22 units a month — against about 40 units for the same light from energy savers and about 180 units from incandescent bulbs.
Power draw
- Low: 5 W
- Typical: 12 W — the figure used in every calculation below
- High: 24 W
A 12 W LED is roughly equivalent in light output to a 20–23 W energy saver or a 100 W incandescent bulb.
Units and cost by usage pattern
Each row is 12 W × the hours shown ÷ 1,000, over 30 days. The three cost columns exist because the rupee cost of a unit depends entirely on which slab your month lands in — the same consumption costs a light user and a heavy summer household very different amounts. Rates are illustrative and not a substitute for the tariff table printed on your own bill.
| Usage pattern | Units / day | Units / month | At Rs 12.5/unit | At Rs 27.5/unit | At Rs 36/unit |
|---|---|---|---|---|---|
| One bulb, six hours a night | 0.07 | 2.2 | Rs 28 | Rs 61 | Rs 79 |
| Twelve bulbs averaging five hours | 0.72 | 21.6 | Rs 270 | Rs 594 | Rs 778 |
Rate bands: Rs 12.5 — light user, protected (≈150 units/month); Rs 27.5 — average household (≈250 units/month); Rs 36 — heavy summer month (700+ units). This appliance runs all year, so the monthly figure applies in every cycle.
The whole-house arithmetic
Twelve incandescent bulbs at 100 W each, averaging five hours a day, is 6 units a day and 180 units a month. The same light from 12 W LEDs is 0.72 units a day and about 22 units a month.
That is a saving of roughly 158 units every month, indefinitely. In a household already in a high slab, it is one of the largest single reductions available and the payback is measured in weeks.
Buying LEDs that survive Pakistani voltage
Cheap LED bulbs fail early here, and the cause is almost always the driver circuit rather than the diodes. Wide input voltage range and a metal rather than plastic heat sink are the two things worth paying for.
A bulb that fails in eight months has not delivered the saving its price assumed. Buying the cheapest available repeatedly is more expensive than buying a decent one once.
Heat, which people forget
An incandescent bulb turns most of its energy into heat. In a room being air conditioned, that heat is then removed at further cost, so the true saving from LED conversion in a cooled room is larger than the lighting arithmetic alone suggests.
How to use less
- Convert the lights that run longest first — outdoor and corridor lighting before a guest room.
- Match brightness in lumens rather than by wattage habit; over-lighting a room in LED is still waste.
- Choose warm white for living areas and cool white for kitchens and workspaces; a bulb people dislike gets replaced with an old one.
- Do not put an ordinary LED bulb in a fully enclosed fitting — trapped heat kills the driver.
Frequently asked questions
How much can LED bulbs save on a Pakistani electricity bill?
Converting a twelve-bulb house from incandescent to LED saves in the region of 150 units a month at typical usage. Converting from energy savers saves nearer 18 units — real, but far less dramatic.
Do LED bulbs work on a UPS or inverter?
Yes, and very well — their low draw means a modest battery can run a house's lighting for many hours, which is why LED conversion is usually the first step before sizing any backup system.
Compare with
- Tube lights (fluorescent and LED) — 45 W typical
- LED television — 90 W typical
- UPS / home inverter — 180 W typical
Go further
Filed under lighting in the full appliance index. Add your own hours in the consumption calculator, or open your actual bill with the reference number lookup.