What It Really Costs to Light an Irish Home — 2026 Data

€427 vs €76: the same Irish home, two lighting stocks, 2026 electricity prices.

One year of lighting in a typical Irish home, costed room by room at 2026 electricity prices. Model & analysis by Evan.G, Residential Lighting Consultant, Lighting Dublin. 12 min read.

Key Findings (Press-Ready Numbers)

• €76 — annual cost to light a fully-LED Irish home (201 kWh/yr)
• €427 — the same home with halogen & incandescent bulbs (1,122 kWh/yr)
• 5.6× — more expensive to run pre-LED lighting in 2026
• 58% — of the annual lighting bill falls in October–March
• €27.77 — yearly cost of ONE 50W halogen GU10 (4h/day) vs €3.33 for LED
• 2.2 months — payback time on a €4.50 LED GU10 replacement
• 251 kg vs 45 kg — CO₂/year, pre-LED home vs LED home
• 206 kg — CO₂ saved per year by a full LED conversion

Five quotable statistics for press use

Attribution: Lighting Dublin, "Cost of Lighting an Irish Home 2026"

"Lighting a pre-LED Irish home costs up to €427 a year at 2026 prices — €351 more than the same home in LEDs."

"One forgotten 50W halogen bulb costs an Irish household €27.77 a year; its LED replacement costs €3.33."

"58% of Ireland's home lighting cost falls in the six winter months, peaking just as electricity prices hit their 2026 highs."

"Swapping 20 halogen downlights for LEDs saves about €489 a year — the bulbs repay themselves in roughly two months."

"A five-bulb pendant left on overnight costs 61c a night with old bulbs, versus 14c with LEDs."

News context (2026): Electric Ireland raised residential electricity prices by 8% from 1 July 2026 (unit rate +9.5%) — about €138 more on the average annual bill. Typical Irish unit rates now sit at 30–35c/kWh including VAT depending on supplier and plan, with the standard undiscounted rate at 38.04c.

Methodology & Assumptions

This is a bottom-up energy model of a typical CRU-average Irish household — the 3–4 bed semi consuming 4,200 kWh of electricity a year and paying an average annual bill of about €1,868. Every figure in this study is reproducible from three inputs:

For each room we modelled wattage of installed fittings × daily burn-hours × 365 days, using winter/summer burn-hour splits calibrated to Irish daylight patterns (evening lighting from ~4:30pm in winter). "Legacy" home = the same house with pre-LED stock: 50W halogen GU10 downlights, 40–60W incandescent pendants and lamps. At the discounted SSE rate, every euro figure in this study drops by roughly 19% — the ratios don't change.

Room-by-Room Running Costs

The table below costs every room of the modelled home for a full year at 38.04c/kWh. The kitchen and living room dominate — not because their bulbs are brighter, but because those are the rooms Irish homes actually light.

Two observations worth keeping: the average light point costs €3.19 a year to run in a modern LED home — less than a coffee — but the connected load matters. If every fitting in the modelled home burned one extra hour a day, that's another €39 a year. To work out the right number of fittings for your own rooms, use our free Irish Lighting Calculator (EN 12464-1 lumen method) or the downlights spacing guide.

Shop LED bulbs by lumen and Kelvin → From €2.95/bulb · Free delivery over €50 · 30-day returns

The Winter Effect: 58% of the Bill in Six Months

• Winter (Oct–Mar, 182 days): €45 · 58% · 118 kWh
• Summer (Apr–Sep, 183 days): €32 · 42% · 84 kWh

That seasonality is exactly why lighting is an October problem: the bills land in January, and every legacy bulb swapped before the clocks change is money kept all winter. In a legacy home the same split applies — roughly €248 of the €427 annual cost falls in winter.

LED vs Halogen: The €351 Gap

Here is the headline comparison — the same 3–4 bed semi, run twice: once with a fully-LED stock (2026 typical), once with the halogen and incandescent fittings still common in Irish rental and never-retrofitted housing.

• Legacy home (50W halogens, 40–60W incandescent pendants) — 1,122 kWh → €427/yr
• LED home (same rooms, same usage) — 201 kWh → €76/yr
• €351 — annual saving from full LED conversion
• 921 kWh — electricity saved per year — 82% less lighting energy
• €0.53 vs €0.11 — cost of every light in the house burning for one hour: legacy vs LED

The kitchen is the single biggest culprit. A run of six 50W halogen GU10 downlights plus two 60W pendants draws 420W — the LED equivalent draws 54W for the same light output. In rooms that run 3–4 hours a day year-round, that difference alone is worth €170+ a year. If your downlights are still halogen, the GU10 replacement guide covers fire-rated and dimmable options for Irish ceilings.

The Carbon Line: 251 kg vs 45 kg CO₂

• Legacy home lighting emissions (1,122 kWh): 251 kg CO₂/yr
• LED home lighting emissions (201 kWh): 45 kg CO₂/yr

Even the micro-swaps add up at national scale: converting 20 halogen downlights in one home saves about 110 kg CO₂ a year (489 kWh avoided). Ireland's electricity grid is getting cleaner every year, which lowers the absolute carbon figures over time — but the wattage you avoid paying for is the part you control today.

What Bulbs Actually Cost to Run

The wattage trap: shoppers compare bulbs by brightness (lumens) and price — rarely by the running cost printed on the box. A €1.50 halogen GU10 is a €27.77-a-year commitment; a €4.50 LED twin costs €3.33 a year. Over five years the "cheap" bulb costs about €135, the LED about €21 including the purchase.

Payback: LED Bulbs Repay Themselves in Weeks

At 2026 prices, LED replacement is not a green gesture — it is the highest-return thing in the house:

• A €4.50 LED GU10 replacing a 50W halogen (4h/day) pays for itself in ~2.2 months, then saves €24.44 every year after.
• A €6 premium LED GU10 (high CRI, dimmable): payback in ~2.9 months.
• Twenty halogen downlights converted: ~€489 back every year — roughly the cost of a mid-range LED pendant, annually.
• Full-house conversion (modelled home): €351/year back, versus a bulb spend of roughly €120–180 if you replace everything at retail.

Replace the expensive bulbs first — every equivalent is listed →

What to Change First (Checklist)

• Hunt the halogens first. Any GU10 or G9 running over 30W is a money leak — convert the kitchen run before anything else.
• Count the candle bulbs. Multi-bulb pendants with 5–6 incandescent candles can hide 200W+ of load.
• Match, don't mix. When replacing, match the colour temperature of remaining bulbs in the same room — 2700K in living spaces, 3000–4000K in kitchens. See the room-by-room lighting advice guide.
• Use the maths on outdoor lights. Sensor lights that run dusk-to-dawn are worth the LED premium immediately.
• Check the box for lumens AND watts. Buy on lumens (brightness), confirm the wattage draw is under 10W per point, and you've won — the lumens guide explains the conversion.

Frequently Asked Questions