Ask how many lumens a garage needs and most guides hand back a single American number in square feet and foot-candles. That is not much help when you are planning an Australian garage measured in metres. This guide gives you the metric answer, tied to Australian lighting practice, with worked examples for real single, double and triple garage sizes so you can plan with confidence.
Quick answer: lux and lumen targets by garage use
Lighting is designed around lux (light landing on the floor), not raw lumens. In metric terms, 1 lux equals 1 lumen per square metre. The right level depends entirely on what you do in the space:
- Parking and storage: roughly 50 to 150 lux. Enough to move around safely and find things.
- General residential use: roughly 200 to 300 lux. Comfortable for cleaning, light DIY and everyday tasks.
- Workshop and mechanical work: roughly 300 to 500 lux. Bright, even light for tools, benches and repairs.
- Detailing and inspection: roughly 750 to 1000 lux or more. High, uniform, colour-accurate light for paint correction and fine finishes.
As a fast rule for a typical Australian double garage of about 36 square metres, plan for somewhere between 15,000 and 26,000 delivered lumens for general to workshop use, and more again if you detail cars. The rest of this guide shows exactly how those figures are reached.
Lumens vs lux vs watts explained in metric
These three terms get mixed up constantly, so here is the plain version:
- Lumens measure the total light a fixture produces.
- Lux measure how much of that light actually reaches a surface. One lux is one lumen spread over one square metre.
- Watts measure electricity used, not brightness. A modern LED can deliver well over 100 lumens per watt, so watts alone tell you nothing about how bright a space will be.
The takeaway: buy for lumens and design for lux, then use watts only to check running cost. Spreading the same lumens across more fixtures raises real-world lux on the floor because the light is more even and loses less to shadows and dark corners.
What AS/NZS 1680 and workplace guidance suggest
The interior lighting series AS/NZS 1680 sets out recommended maintained illuminance for different tasks, and Australian work health and safety guidance follows similar principles for spaces used commercially. General movement and rough tasks sit at the lower end, routine bench work in the middle band, and fine or colour-critical inspection at the top. A home garage is not legally bound to workplace figures, but if you run a business from the space, or want light that genuinely feels professional, matching those task-based levels is the sensible target. That is why the ranges above step up from storage to detailing rather than using one blanket number.
The simple metric formula for garage lumens
Use this to size any garage:
Required fixture lumens = floor area (m2) x target lux / utilisation allowance
The utilisation allowance accounts for light lost to fixture efficiency, mounting height, wall colour and dust over time. For a typical garage with light-coloured walls and ceiling-mounted fixtures, use around 0.7. Lower ceilings and pale surfaces push it higher; dark walls and high ceilings push it lower.
Worked examples for real Australian garage sizes
Using a 0.7 allowance and rounding sensibly:
- Single garage, about 3 x 6 m (18 m2): general use at 300 lux needs about 7,700 lumens; workshop use at 500 lux needs about 12,900 lumens.
- Double garage, about 6 x 6 m (36 m2): general use at 300 lux needs about 15,400 lumens; workshop use at 500 lux needs about 25,700 lumens; detailing at 750 lux needs about 38,600 lumens.
- Triple garage, about 9 x 6 m (54 m2): general use at 300 lux needs about 23,100 lumens; workshop use at 500 lux needs about 38,600 lumens.
- Dedicated detailing bay, about 4 x 7 m (28 m2): at 1000 lux needs about 40,000 lumens of even, colour-accurate light.
Notice how the numbers climb quickly with both size and task. This is exactly why a single central fixture struggles: it cannot deliver those totals evenly across the floor.
Comparison table: garage use vs lux vs foot-candles
| Garage use | Target lux | Approx. foot-candles | Design priority |
|---|---|---|---|
| Parking and storage | 50 to 150 | 5 to 14 | Safe, even coverage |
| General residential | 200 to 300 | 19 to 28 | Comfort and everyday tasks |
| Workshop and mechanical | 300 to 500 | 28 to 46 | Brightness and low shadow |
| Detailing and inspection | 750 to 1000+ | 70 to 93+ | Uniformity and colour accuracy |
Foot-candles are shown only for readers cross-checking older overseas guides. In Australia, lux is the working unit.
How ceiling height, mounting height and spacing change the numbers
The higher a light is mounted, the more its beam spreads before reaching the floor, so lux at bench level drops. A standard Australian garage ceiling of about 2.4 to 2.7 m suits most surface or lightly suspended fixtures. Higher sheds and warehouse-style garages of 3.5 m or more usually need higher-output fixtures or more of them to hit the same floor lux. Spacing matters just as much: fixtures placed too far apart leave dark bands between them, so aim for overlap in the light footprints rather than isolated pools of brightness. Our garage lighting range is designed to be gridded across a ceiling for that reason.
Colour temperature and CRI by task
Brightness is only half the story. Colour temperature, measured in Kelvin, sets the mood and clarity:
- 4000K: a warm-neutral white, comfortable for garages that double as a living or hobby space.
- 5000K: a crisp daylight white and the popular all-rounder for garages and workshops, sharp without feeling clinical.
- 6500K: a very cool, bright white favoured for inspection and detailing where maximum clarity matters.
Colour rendering index (CRI) tells you how true colours look under the light. CRI 80 and above is fine for general use, but for paint matching, detailing and any colour-critical work, look for CRI 90 and above so finishes and defects show honestly. Browse the full hexagon LED lighting collection to compare colour temperature options.
Why a hexagon grid beats one central light
A single central fixture throws most of its light straight down, leaving corners dim and casting hard shadows the moment you stand over a bench or bonnet. A distributed grid of hexagon panels spreads output across the whole ceiling, so light arrives from several directions at once. That does three things: it lifts and evens out floor lux, it fills in the shadow you would otherwise cast over your own work, and it makes the space feel larger and more uniform. For workshops and detailing especially, uniformity is often more valuable than raw peak brightness. If your garage doubles as a home gym or trade space, the same principle carries over to our workshop lighting range.
Choosing fixtures: total lumens vs per-fixture lumens
Once you know the total lumens your garage needs, divide by the output of a single fixture to get the count, then arrange them in an even grid. For a 36 m2 double garage targeting workshop-level light of about 25,700 lumens, four to six well-placed fixtures usually give far better uniformity than one or two very bright units. More moderate fixtures almost always beat fewer intense ones for shadow control and comfort.
Running costs, dimming and zoning
LED keeps running costs low. As an illustration, running 100 W of LED lighting for two hours a day uses about 0.2 kWh daily. At an indicative Australian rate of around 0.30 dollars per kWh, that is roughly 22 dollars a year. Actual cost depends on your tariff and usage, so treat this as a guide rather than a quote. To trim it further, add dimming so you are not running full output for simple tasks, and zone the space so the workbench and parking areas can be lit independently. Our dimmable hex lighting dims straight from a standard wall switch on the Classic models, so you can dial back brightness without a separate dimmer.
When you need a licensed electrician
In Australia, any hardwired lighting connected to your home circuits must be installed by a licensed electrician, and fittings should carry the relevant electrical compliance such as RCM marking under the national approval scheme. Plug-in and plug and play options can be set up yourself and simply run from a standard wall switch or power point. If you are hardwiring a full garage grid, budget for a licensed electrician as part of the job and confirm your fittings are compliant before installation.
Frequently asked questions
How many lumens does a double garage need in Australia?
A typical double garage of about 36 square metres needs roughly 15,400 lumens for general use at 300 lux, around 25,700 lumens for workshop use at 500 lux, and about 38,600 lumens if you detail cars at 750 lux. Spread that across four to six evenly placed fixtures for the best uniformity.
Is 5000K or 6500K better for a garage?
5000K is the popular all-rounder for most garages and workshops because it is crisp and daylight-like without feeling harsh. Choose 6500K only when you want the coolest, brightest white for detailing or inspection, and pair it with CRI 90 or above for accurate colour.
What is the difference between lumens and lux?
Lumens measure the total light a fixture produces, while lux measure how much of that light lands on a surface. One lux equals one lumen spread over one square metre, so a large garage needs far more lumens to reach the same lux as a small one.
Do I need a licensed electrician to install garage lighting?
Any hardwired lighting connected to your home circuits must be installed by a licensed electrician in Australia. Plug-in and plug and play fittings can be set up yourself and run from a standard wall switch or power point.
How many hexagon lights do I need for my garage?
Work out your total required lumens using floor area in square metres times target lux divided by about 0.7, then divide that by the output of a single fixture. For most double garages this lands at four to six panels arranged in an even grid for shadow-free coverage.
