LED Retrofit ROI for Pakistani Factories 2026 — Tube Light, High-Bay, Street Lighting Payback
18 Jun 2026
Does LED retrofit make sense for my Pakistani factory in 2026?
Yes — payback is typically 6-18 months for industrial lighting at current electricity rates (Rs. 38-55/unit industrial). A typical Pakistani factory with 100× 40W tube lights running 12 hours/day pays ~Rs. 40K/month for tube lighting alone. Replacing with 18W LED tubes drops that to ~Rs. 18K/month — saves PKR 264K/year against a retrofit cost of PKR 120K. Payback: 5.5 months. Bigger savings on high-bay 250-400W metal halide → 80-150W LED: typical 12 high-bays in a Pakistani factory save Rs. 180K-300K/year, payback 8-14 months.
Pakistani factory lighting load profile
| Fixture type | Conventional W | LED equivalent W | Energy saving % | Lumens (similar) |
|---|---|---|---|---|
| T8 4ft tube light | 40 W (+ 8W ballast loss) | 18 W (built-in driver) | ~63% | ~2,200 lm |
| CFL 36W | 36 W | 12 W | ~67% | ~1,200 lm |
| Incandescent 100W | 100 W | 12 W | 88% | ~1,300 lm |
| Metal halide high-bay 250W | 280 W (+ ballast) | 100 W LED high-bay | ~64% | ~15,000 lm |
| Metal halide high-bay 400W | 440 W (+ ballast) | 150-180 W LED high-bay | ~60% | ~28,000 lm |
| Sodium vapour street light 150W | 165 W (+ ballast) | 60 W LED street light | ~64% | ~7,500 lm |
| Halogen flood 500W | 500 W | 100 W LED flood | 80% | ~10,000 lm |
Payback calculation — Pakistani factory tube-light retrofit
Scenario: 100× T8 4ft tube lights running 12 hours/day, 26 days/month.
BEFORE (40W + 8W ballast = 48W effective):
- Monthly energy: 100 × 48W × 12h × 26 days = 1,497.6 kWh/month
- Monthly cost @ Rs. 38/unit blended: PKR 56,910
- Annual cost: PKR 682,920
AFTER (18W LED tube, no ballast):
- Monthly energy: 100 × 18W × 12h × 26 days = 561.6 kWh/month
- Monthly cost @ Rs. 38/unit: PKR 21,341
- Annual cost: PKR 256,090
SAVINGS:
- Energy saved: 936 kWh/month, 11,232 kWh/year
- Rupee saved: PKR 35,569/month, PKR 426,830/year
- Retrofit cost: 100 × PKR 950 LED tubes + PKR 25,000 labour = PKR 120,000
- Payback: 3.4 months
- 5-year ROI: 422 / 120 × 5 = 17.7×
High-bay retrofit — typical Pakistani factory scenario
Scenario: 12× 250W metal-halide high-bays running 16 hours/day in a marble factory production hall, 26 days/month.
BEFORE (280W effective with ballast):
- Monthly energy: 12 × 280W × 16h × 26 days = 1,397.8 kWh/month
- Monthly cost @ Rs. 42/unit industrial: PKR 58,706
- Annual cost: PKR 704,470
AFTER (100W LED high-bay):
- Monthly energy: 12 × 100W × 16h × 26 days = 499.2 kWh/month
- Monthly cost: PKR 20,966
- Annual cost: PKR 251,597
SAVINGS:
- Energy saved: 898.6 kWh/month, 10,783 kWh/year
- Rupee saved: PKR 37,740/month, PKR 452,873/year
- Retrofit cost: 12 × PKR 22,000 LED high-bay + PKR 15,000 labour = PKR 279,000
- Payback: 7.4 months
- 5-year ROI: 453 / 279 × 5 = 8.1×
Why LED beats CFL/fluorescent on more than just energy
- Lifetime: CFL ~8,000-10,000 hours; T8 fluorescent ~20,000 hours; quality LED 25,000-50,000+ hours. At 12h/day = LED lasts 5-12 years vs CFL 2-3 years.
- Maintenance labour: Pakistani factory with 100 tube lights replaces ~30 tubes/year on fluorescent (mortality). LED drops that to ~5-10/year.
- No ballast failures: traditional fluorescent ballasts fail at ~50% the rate of tubes. LED has integrated driver — fewer failure modes.
- Cold-start performance: fluorescent slow to reach full brightness in Pakistani winter mornings; LED instant-on.
- No mercury: LED non-hazardous on disposal vs fluorescent containing mercury.
- Cooler operation: LED ~30% heat output vs fluorescent. Cuts AC load in summer.
- Dimming + smart control: LED dimmable + smart-switch compatible; fluorescent CFL flickers when dimmed.
Hidden Pakistani-specific savings
- MD reduction: 100 tube retrofit = 3 kW reduction in connected load. If your factory hits 1-kW-overflow MD penalty, this alone may be worth Rs. 50K/year extra.
- PF improvement: T8 magnetic-ballast PF ~0.5; LED driver PF ~0.95. PFC bank kvar requirement drops 15-25%.
- Harmonic reduction: cheap LED drivers can be WORSE than fluorescent for THD. Buy LEDs with PF >0.9 + THD <20% specified — avoids harmonic penalties.
- AC load relief: 5-7 kW lighting heat eliminated = ~0.5-0.7 ton AC load reduction in offices.
Common Pakistani LED retrofit mistakes
- Buying cheapest LED tubes (PKR 300-500/each) — they fail in 6-12 months. Total cost-of-ownership is worse than paying PKR 950 for genuine 25K-hour LEDs.
- Skipping ballast removal on T8 retrofit — old magnetic ballast keeps drawing 8W even though LED tube is "self-driven". Always remove ballast OR use direct-wire LED tubes (bypass ballast).
- Wrong color temperature — installing 6500K cool-white in office area causes eye strain; warm 4000K is comfortable. For workshops 5000-6500K daylight is correct.
- Mismatched lumen output — replacing 250W metal-halide (15,000 lm) with a 60W LED (only 7,000 lm) under-lights the area. Match lumens-for-lumens, not wattage.
- No surge protection on LED arrays — Pakistani voltage spikes destroy LED drivers. Add Type 2 SPD upstream of lighting circuits.
- Counterfeit / unbranded — same risks as counterfeit MCBs. Demand manufacturer warranty + IEC 60598 + IEC 62031 compliance.
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MD Penalty Calculation · Factory PQ Audit Checklist · Why Breakers Fail
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