Feb 05, 2026

First-Fix Lighting Plan Ireland 2026: Room-by-Room Checklist for a Coherent Second Fix

Irish_home_at_first_fix_with_marked_lighting_positions_and_ceiling_plan_overlays - Lighting Dublin

Quick answer

A first-fix lighting plan for an Irish home locks in your circuit layout, switch positions, bathroom IP zones, and dimmer compatibility before any boards go up. Get it right at first fix and second fix is straightforward. Get it wrong and you're chasing walls. This checklist covers every decision in order, from palette to procurement.

Planning your first-fix lighting in Ireland is the moment where aesthetics, wiring, and safety need to line up before the plasterboard goes up. This practical guide, written with input from a Safe Electric-registered electrician, gives you a room-by-room checklist to keep your scheme coherent, compliant, and on schedule for second fix.

Why a lighting plan at first fix saves money

The most common misconception about first-fix lighting planning is that it's an extra cost. It's the opposite. A coherent plan agreed before first fix means you buy the right fittings once. You don't pay an electrician to chase walls because a switch position was wrong. You don't retrofit dimmer circuits because nobody thought to pull neutrals at the right time.

You can spend the same amount of money on a generic layout with a load of evenly-spaced downlights as on a considered scheme with layered lighting from ceiling to floor — but the considered scheme will look and feel significantly better, and it leaves budget for nicer fittings at second fix because the structural work is done efficiently. The decisions made in the ten minutes it takes to walk a room at first fix determine what the room is capable of for the next twenty years.

Pre-design decisions that lock in cohesion

Before anyone pulls cable, set the rules for how your home should feel. A little forethought here prevents a patchwork look and expensive changes later.

Choose a consistent family of finishes — warm brass and matte black, for example — that works across rooms. Keep junction box trims and visible hardware in the same family where possible. For colour temperature, 2700–3000K feels warm and welcoming in most Irish homes. Hold CRI at 90 or above in kitchens and bathrooms where truer colour rendering at task areas matters. Think of CRI as the colour fidelity score: high CRI makes materials and food look accurate under artificial light.

Consider beam angles early: narrower beams for accents, wider beams for a general wash. Plan baffles or soft lenses for living rooms and bedrooms where glare will be an issue at seated eye level. Match pendants and wall lights to ceiling heights and furniture scale before specifying. Over islands, allow visual breathing room. In halls, keep fittings clear of door swings.

A coherent plan lets you swap individual products if stock shifts without breaking the overall look, because the finish palette, colour temperature, and form language are already fixed.

Compliance: bathroom IP zones and Irish electrical standards

Safety and compliance are planned, not retrofitted. While the full standards are behind paywalled documents, the public guidance is clear.

Ireland's IS 10101:2020 has been amended by A1:2024, with AC2:2025 context. The update strengthens safety and energy-efficiency requirements in domestic design. Designers increasingly prefer individual RCBOs for lighting circuits to improve fault isolation. See the NSAI notice on IS 10101:2020+A1:2024 and the Engineers Ireland amendments overview for context.

For bathroom zones and IP ratings, plan fittings by zone in line with BS 7671 practice: Zone 0 (inside the bath or shower) requires IPX7 minimum, SELV only. Zones 1 and 2 require IPX4 minimum, rising to IPX5 where water jets or spray cleaning is likely. Place transformers and drivers outside the zones where practicable. Useful references: NICEIC's bathrooms and electrics guidance and Electrical Safety First's summary on new installations (30mA additional protection is expected on most circuits in Irish homes). Always coordinate with a registered Safe Electric electrician and document your circuit and switching intentions so they can verify against the standards before first fix.

First-fix wiring checklist for control and future upgrades

What you wire at first fix decides how flexible your home will be five and ten years from now. Walk through this checklist on site with your electrician before any boards go up.

Provide a neutral at each switch position where feasible to support smart controls and a wider range of dimmers.
Use deep back boxes (35–47mm) to accommodate dimmer modules and future smart bridges.
Pull spare cores or install conduits to key locations — feature lighting positions, mirror niches, alcoves — so loads can be split later without chasing plaster.
Map two-way, three-way, and intermediate switching for stairs, landings, and long corridors. Record this on a switching logic plan.
Keep extra-low-voltage (ELV) and low-voltage (LV) cabling segregated. Plan driver and hub locations in accessible voids or cupboards.
Prefer RCBOs on individual lighting circuits for discrimination and faster fault finding.
Agree back-box positions and depths before boarding to avoid clashes with cabinetry, architraves, and studwork.
If underfloor heating is going in, coordinate the electrical first fix with the UFH contractor. Both require access to the floor screed or joist space at the same stage. Don't let trades sequence separately or one will undo the other's work.
Fit 5-amp switched sockets in sitting rooms and bedrooms for future floor and table lamps. These allow lamps to be switched at the wall rather than at the lamp itself — standard practice in well-specified Irish homes, often overlooked in simpler builds.

Document these decisions. A one-page plan kept on site saves time and avoids guesswork when trades change over.

Downlights: fire rating and insulation

Recessed fittings can compromise fire and acoustic performance if the decisions are rushed. These rules are non-negotiable.

Maintain the ceiling's tested fire performance: use fire-rated luminaires or tested fire-stopping accessories as specified by the product and ceiling system.
Don't cut holes until the final layout is agreed. Oversized apertures reduce fire integrity and may not retain the luminaire correctly.
Respect manufacturer clearances: integrated downlights often need 50mm or more of free space above and specific distances from insulation and combustibles. Follow the product data sheet exactly. See SparksDirect's guide to fire-rated downlights for installer context.
If your chosen fitting is not insulation-contact rated, maintain clearances or specify insulation guards. Note this on the plan so the insulation team doesn't blanket the fittings.
For LED strip, niche lighting, and downlights with remote drivers, designate accessible locations for drivers and keep access panels or hatches where needed.

Treat every cut-out and driver location as part of the building fabric, not an afterthought.

Dimming and smart-ready planning

Good dimming is a feel thing: smooth, quiet, flicker-free from full output down to 5%. That requires a small amount of prep at first fix.

Prefer trailing-edge dimmers for most modern LED loads. They run quieter and smoother at the low end. See Varilight's V-Pro setup guide (default trailing-edge mode) and Lutron's trailing-edge lamp dimmer datasheet for technical detail.

Always test a sample pack before bulk ordering: one dimmer plus the exact lamp and driver combination you plan to use. Watch for dropout, shimmer, or buzz at low brightness. Confirm driver types — ELV versus constant-current or constant-voltage — and match the dimmer method accordingly. For smart-ready wiring: neutrals at switches, spare cores for scene control or PIRs, Cat6 to hub locations if required by your chosen system.

Room-by-room notes

Think of each room as a layer within one story. The palette, colour temperature, and form language maintain continuity. The layers and switching give each space its own function.

Kitchen: pair ambient light from a few downlights or a flush fitting with task lighting over worktops and the island, plus a small accent layer. Target CRI 90 or above at task areas. Consider 2700–3000K for comfort in the eating zone. Keep drivers for under-cabinet strip lighting accessible. Don't position downlights in the gap between counter and island — they'll light the floor rather than the worktop. Our spotlights and downlights collection covers the main options for recessed kitchen lighting.

Bathrooms: apply zones and IP ratings strictly. Add vanity lighting at mirrors with good glare control — a common omission that makes bathrooms feel dim at the sink where you need clarity most. Coordinate with fan isolator and mirror demister wiring where applicable.

Living room: combine a centrepiece pendant or cluster fitting with perimeter downlights on a separate circuit, plus accent positions for shelving and artwork. Prioritise dimming on all circuits. Open-plan spaces benefit from separate circuits for the kitchen and sitting area so each zone can be controlled independently in the evening.

Bedrooms: warm colour temperature, reading lights with local switching at the bed, two-way switching at the door and bedside, wardrobe task lighting where useful. Switched 5-amp sockets for bedside lamps avoid trailing cords across the floor.

Halls and landings: two-way or three-way switching and occupancy sensors for safety and convenience. Consider low-level night lighting for stair treads — wall-recessed stair lights installed at first fix are invisible when off and effective when needed, particularly in houses with young children.

Exterior: choose IP ratings appropriate to exposure — IP65 in direct spray zones is typical. Ensure RCD protection and safe isolation for maintenance access. Plan garden lighting circuits at first fix even if you don't install the fittings immediately — it's a fraction of the cost to pull cables now versus chasing through finished landscaping later.

Keep notes on mounting heights, clearance above fittings, and intended scenes per circuit. The upstairs landing should not feel like it came from a different house than the ground floor.

What does a lighting plan cost in Ireland?

A professional lighting design consultation for an Irish home typically runs €300 to €800 depending on house size and the detail required. For a full scheme covering every room with circuit diagrams and product specifications, expect €600 to €1,200 from a specialist lighting designer. On a large self-build or significant renovation, this fee is usually returned many times over in avoided mistakes and better product choices.

For straightforward renovations and new builds where the homeowner is engaged in the process, a competent electrician with a clear brief from the homeowner can achieve a well-designed scheme without a separate lighting consultant. The brief needs to cover: switch positions, circuit groupings, dimming requirements, IP zones, and the intended fittings. This checklist is the starting point for that brief.

SEAI offers grants for energy-efficient lighting upgrades in Irish homes as part of its home energy grant programme. LED lighting upgrades are eligible under certain schemes — worth checking before specifying fittings for a deep retrofit.

Procurement and logistics: avoiding second-fix surprises

A well-designed scheme still misses the second-fix date if the products don't arrive — or arrive with the wrong dimmers. Lock procurement early.

Confirm availability for all critical products before booking second fix. Hold 10–15% contingency on trims and lamps.
Check returns windows and condition requirements. Don't open bulk boxes until after your test pack passes dimmer compatibility checks.
Stage delivery: drivers and dimmers arrive early for testing; fragile pendants arrive closer to second fix.
Attach data sheets to your specification schedule so trades can verify IP ratings, fire ratings, dimming method, and cut-out sizes on site without calling you.

Use this template in a spreadsheet to track each fitting. Fill in your product SKUs before ordering:

Room	Fitting type	IP rating	Lumens / CCT	CRI	Dimming method	Fire rating	Qty	Lead time
Kitchen	Recessed downlight	IP20	600lm / 3000K	90+	Trailing-edge	Fire-rated	8	Confirm before booking 2nd fix
Bathroom	IP65 downlight	IP65	400lm / 3000K	80+	Non-dim or trailing-edge	Fire-rated	4	Confirm before booking 2nd fix
Sitting room	Pendant + floor lamp	IP20	800lm / 2700K	80+	Trailing-edge	N/A	1+1	Pendant closer to 2nd fix

Before locking a second-fix date, validate delivery timing and returns policy on product pages. Lighting Dublin offers free delivery across Ireland on orders over €50 and 30-day returns — useful when ordering a test pack before committing to the full specification. Browse the spotlights and downlights collection for recessed options suited to first-fix schemes.

Handover pack for your electrician

A good handover cuts phone calls and rework. Package it like this:

Circuit schedule with protective devices noted (RCBOs preferred), including load estimates per circuit.
Switching logic map showing two-way, three-way, and intermediate controls, plus any PIR positions.
Luminaire schedule with IP rating, dimming method, fire rating, cut-out sizes, and driver locations and access points.
Manufacturer data sheets and installation notes for each fitting and dimmer.
Change log for substitutions if lead times shift. Record any impact on cut-outs, drivers, or IP and fire ratings.

Keep a printed copy on site and a digital copy in the build folder.

Common mistakes at first-fix lighting

Wrong IP rating for shower areas. Ignoring IPX5 where jets are likely puts the installation outside compliance and creates a safety risk. Zone mapping must happen before first fix, not at second fix when fittings arrive.
Cutting downlight holes before layout is final. Oversized or repositioned apertures compromise fire integrity. Don't cut until the ceiling plan is agreed and signed off.
Hiding LED drivers. Drivers in inaccessible ceiling voids can't be maintained or replaced without significant disruption. Designate access panels or service voids at first fix.
Omitting neutrals at switches. Without a neutral, smart dimmers and many modern LED dimmers won't work. It costs almost nothing extra to pull a neutral at first fix. Retrofitting one later costs a lot.
Skipping the dimmer test pack. Discovering dimmer incompatibility after all fittings are installed and ceilings are finished is expensive. Order one dimmer and one lamp from each circuit type and test before bulk ordering.
Assuming delivery dates. Missing second fix because a product is out of stock is more common than it should be. Confirm availability before booking the second-fix date, not after.

Frequently asked questions

What is a first-fix lighting plan and when do I need it?

It's the coordinated wiring, switching, compliance, and procurement plan you finalise before plastering. The decisions made at first fix — circuit layout, switch positions, back-box depth, driver locations — determine what's possible at second fix. Changing any of these after the boards are up means chasing walls. Get the plan right before any plasterboard goes up, ideally before the first fix electrician is on site.

Do I need RCBOs on lighting circuits in an Irish home?

Many designers and electricians now prefer individual RCBOs for selectivity and easier fault isolation on lighting circuits. This aligns with the safety themes highlighted in the NSAI and Engineers Ireland overviews referenced above. Your Safe Electric-registered electrician will confirm the final circuit design based on your specific installation and the current IS 10101 requirements.

What IP rating do I need in an Irish bathroom?

Zone 0 (inside the bath or shower): IPX7 minimum, SELV only. Zones 1 and 2: IPX4 minimum, rising to IPX5 where water jets are likely. Outside the zones, consider splash risk regardless of the technical minimum. Always follow the manufacturer's installation instructions alongside the zone requirements, and use a RECI-registered electrician for the installation.

How do I test dimmer compatibility before buying in bulk?

Order one dimmer plus a single sample of each lamp and driver combination you plan to use. Fit and test before the second-fix date. Check for flicker at low brightness, dropout when dimming below 20%, and any audible buzz from the dimmer or the lamp. Only open the bulk order once the test pack passes. Trailing-edge dimmers are generally the right starting point for modern LED loads.

Do I need to coordinate lighting with underfloor heating at first fix?

Yes. Both UFH and electrical first fix require access to the same floor and ceiling spaces. If the UFH contractor and electrician work out of sequence, one trade's work can block or damage the other's. Agree the programme with your main contractor before either trade is on site. In particular, thermostat positions and any in-floor sensors need to be cabled before the screed goes down.

Written with input from a Safe Electric-registered electrician. Always verify decisions against the current Irish standard (IS 10101), manufacturer instructions, and local site conditions before installation.

The Lighting Dublin Team publishes practical lighting guides for Irish homes. Browse spotlights and downlights and ceiling lights for products suited to first-fix schemes. Free delivery across Ireland on orders over €50, 30-day returns.

See also: buying ceiling lights in Dublin homes for IP zone rules and sizing guidance, and ceiling lights room-by-room for product recommendations at second fix.