What You're Probably Working With
Most Australian offices built or fitted out before 2020 have one of two ceiling lighting setups: recessed troffers (the rectangular or square fittings flush with a drop ceiling) or surface-mounted battens (the exposed tube holders common in older buildings and back-of-house areas). A smaller number of offices have downlights or luminous ceiling panels, but fluorescent tubes are by far the most common.
The tubes themselves are almost always T8 (26mm diameter) at either 1200mm (36W) or 1500mm (58W). Some older buildings have T12 tubes (38mm diameter) which are even further out of production. More modern offices built in the 2000s and 2010s sometimes have T5 tubes (16mm diameter, 28W or 54W) in slimline troffers. Identifying what you have before calling an electrician will save time and help you get a more accurate quote.
T8 Tubes
26mm diameter. Most common in Australian offices. 1200mm (36W) or 1500mm (58W). Usually 2 or 4 tubes per troffer fitting. Ballast is inside the fitting.
T5 Tubes
16mm diameter. Slimmer, higher efficacy than T8. Common in office fitouts from the 2000s onward. 28W (1149mm) or 54W (1149mm). Often in modular troffers.
T12 Tubes
38mm diameter. Older buildings only. 40W (1200mm) typical. If you have these, full fitting replacement is almost always the right answer: ballasts are end-of-life.
Before your electrician visits, take note of: the tube diameter and length, how many tubes per fitting, and whether the fittings are surface-mounted or recessed. A quick photo of the label inside the fitting (usually on the ballast housing) tells an electrician everything they need to quote accurately.
The Three Upgrade Paths
There is no single right answer for every office. The best approach depends on the age of your fittings, your budget, whether you want to minimise disruption, and what your electrician recommends after inspecting the site. Here are the three main options.
Type A Plug-and-Play LED Tubes
Type A LED tubes are designed to work with the existing fluorescent ballast. You simply remove the fluorescent tube and insert the LED tube — no rewiring required. For a building owner or facilities manager, this is the lowest-disruption option: it can often be done lamp-by-lamp as fluorescents fail, without needing a licensed electrician for each individual swap (though check state electrical licensing rules — in some states any work in a fitting requires a licensed electrician).
The catch: your existing ballast must be compatible with the LED tube you're installing. Not every ballast works with every Type A tube. Reputable LED tube suppliers publish compatibility lists. Using an incompatible combination can cause flickering, early failure, or in rare cases a fire risk. Always verify compatibility before ordering.
The second catch: your ballast is still consuming power and still ageing. A Type A installation doesn't eliminate the ballast. It just keeps it in the circuit. When the ballast eventually fails (typically 10–15 years in T8 fittings), you're back to calling an electrician anyway.
✓ Advantages
- Lowest upfront cost per tube
- Minimal installation time
- No rewiring, low disruption
- Can be done incrementally
✗ Disadvantages
- Ballast compatibility must be verified
- Ballast still consuming power (~5W per fitting)
- Ballast still ageing, future work needed
- Not all tube brands are reliable
Direct Wire (Ballast Bypass) LED Tubes
Direct wire LED tubes — also called ballast bypass or Type B tubes — require the ballast to be removed and the fitting rewired so mains voltage feeds directly to the tube holders. This is licensed electrical work in all Australian states. Once done, the LED tube runs directly from 230V mains with no ballast in between.
This is the more thorough solution. Without the ballast, you eliminate a source of heat, energy loss (~5W per fitting) and future failure. The LED tube is the only component that will eventually need replacing, and at end of life it's a simple tube swap. Direct wire LED tubes also tend to have higher lumen output and longer rated life than Type A equivalents.
For a whole-office upgrade, an electrician will typically work through each fitting systematically: removing the ballast, connecting the supply directly to the lamp holders, and fitting the LED tube. It takes slightly longer per fitting than a Type A swap but is a cleaner, longer-lasting result.
✓ Advantages
- No ballast losses, maximum efficiency
- Eliminates a future failure point
- Typically higher lumen output
- Future tube swaps are simple
✗ Disadvantages
- Requires licensed electrician for rewiring
- Higher installation labour than Type A
- Existing fitting must be in good condition
- Tube must be labelled for direct wire use
Full Fitting Replacement: LED Panels or Battens
The third option is to remove the old fluorescent fitting entirely and install a purpose-built LED fitting. For recessed troffers, this usually means an LED panel (a flat, frameless fitting that sits flush in the ceiling grid). For surface-mounted battens, it means an LED batten fitting. Both are significantly thinner, lighter and lower-maintenance than their fluorescent equivalents.
LED panels in particular have become the dominant choice for modern office refurbishments. A 600×600mm LED panel (to suit a standard ceiling grid module) typically produces 3,000–4,500 lumens at 36–40W, broadly equivalent to a four-lamp T8 troffer running at 144W. The energy saving is substantial, and the uniform, shadow-free light distribution is generally considered better for office work than the striped output of tube fittings.
Full replacement is the most disruptive option and the highest upfront cost, but it's often the most cost-effective over the full lifecycle. It also opens up the possibility of dimmable LED drivers, which can be integrated with occupancy sensors and daylight harvesting controls for further energy savings.
✓ Advantages
- Best long-term outcome
- Uniform, high-quality light output
- Compatible with dimming and controls
- No legacy components to fail
✗ Disadvantages
- Highest upfront cost
- More installation time per fitting
- May require ceiling patching if grid spacing differs
- Most disruptive to office during install
Which option is right for your office? If your fittings are in good condition and less than 10 years old, direct wire (Option B) is usually the best balance of cost and outcome. If fittings are aging, damaged, or you're doing a broader refurbishment, full replacement (Option C) gives the cleanest result. Type A (Option A) suits situations where disruption must be minimised and the upgrade will be done in stages.
What to Look for in a Lighting Quote
A good quote from an electrician for an office LED upgrade should specify more than just a price. Before accepting any quote, make sure it clearly states which upgrade approach is being used (Type A, direct wire, or full replacement), the specific LED product (brand, model number and lumen output) and whether existing wiring will be tested or inspected as part of the job.
Lumen output matters significantly. The most common mistake in office LED upgrades is replacing bright fluorescent fittings with LED tubes or panels that don't match the original output. A standard four-lamp T8 troffer produces around 12,000–14,000 lumens. Many budget LED tubes produce 1,600–1,900 lumens each, meaning a two-tube direct wire replacement delivers only 3,200–3,800 lumens — roughly a quarter of the original output. If your office relies on the ceiling fittings as the primary light source, insist on a photometric check or at minimum confirm the total lumen output per fitting before work begins.
| Fitting Type | Typical Fluorescent Output | Recommended LED Equivalent | Notes |
|---|---|---|---|
| 2×T8 36W troffer | ~6,000 lm | 2× LED T8 (3,000 lm each) or 40W LED panel | Most common office fitting |
| 4×T8 36W troffer | ~12,000 lm | 4× LED T8 (3,000 lm each) or 60–80W LED panel | High-output open plan |
| 2×T5 28W troffer | ~5,400 lm | 2× LED T5 adaptor or 36W LED panel | T5 adaptors vary — verify fit |
| 1200mm T8 36W batten | ~3,000 lm | 1× LED T8 (3,000 lm) or LED batten | Corridors, back-of-house |
| 1500mm T8 58W batten | ~5,000 lm | 1× LED T8 (5,000 lm) or LED batten | Larger battens, carparks |
Energy Rebates Available for Office Upgrades
Commercial office LED upgrades are among the most heavily rebated projects under Australia's state energy efficiency schemes. The three main programs that cover office fluorescent-to-LED upgrades are the NSW Energy Savings Scheme (ESS), the Victorian Energy Upgrades (VEU) program, and the South Australian Retailer Energy Productivity Scheme (REPS).
Under these schemes, rebates are typically delivered through the installing electrician or lighting contractor, who is accredited under the relevant scheme and passes the value through as a discount on the invoice. You don't usually need to apply separately, but you do need to use an accredited installer. Ask any electrician quoting the job whether they are accredited under the applicable scheme for your state, and whether the rebate is included in the quoted price.
Western Australia, Queensland, Tasmania, ACT and NT do not currently have equivalent state energy efficiency rebate schemes for commercial lighting. Federal tax deductions (instant asset write-off for eligible businesses) may still apply. Speak to your accountant.
Planning the Upgrade: What to Do Before the Electrician Arrives
Office Lighting Upgrade: Pre-Installation Checklist
Common Mistakes to Avoid
Choosing by wattage, not lumens. A 10W LED tube is not equivalent to a 36W fluorescent. Always compare lumen output, not watts. LED tubes vary widely in output for the same wattage.
Using unverified Type A tubes. Not every LED tube is compatible with every ballast. Unverified combinations can flicker, overheat or fail prematurely. Check the supplier's compatibility list.
Ignoring colour temperature. Most offices suit 4000K (neutral white). Warm white (3000K) can feel dim in open-plan spaces; cool white (6500K) can feel harsh. Check the spec sheet before ordering.
Forgetting emergency lighting. If any of your fluorescent fittings have an emergency battery module, these need to be replaced or upgraded separately. LED emergency fittings are a separate product category.
Buying in bulk before testing. Always install a small batch first, check the light quality and output in your actual space, then order the remainder. Colour temperature and brightness can look different in-situ than on spec sheets.
Missing the rebate window. State energy efficiency schemes have annual budgets that can be exhausted. In Victoria and NSW, rebate availability can tighten mid-year. Get your project scoped early in the financial year.
A Note on DIY vs. Licensed Electrician
In Australia, all three upgrade options involve electrical work that must be done by a licensed electrician. Type A plug-and-play tubes can be physically inserted by anyone, using the same end connectors as the fluorescent tube they replace. However, if the fitting itself needs any adjustment, the wiring is touched, or the work is in a commercial premises subject to WHS obligations, a licensed electrician is required.
The practical answer for most office environments: use a licensed electrician for the entire job. The liability and safety implications of unlicensed electrical work in a commercial space are not worth the saving on labour. A competent electrician will also spot wiring issues, failing ballasts and non-compliant fittings that a DIY approach would miss.
The Efficiency Case in Plain Numbers
A typical 200-fitting office running 2×36W T8 fittings (72W each including ballast losses) 10 hours a day, 250 days a year consumes approximately 36,000 kWh annually.
The same office with 40W LED panels consumes approximately 20,000 kWh annually, a reduction of around 44%. At a commercial electricity rate of 28–32 c/kWh, that represents a saving of roughly $4,500–$5,100 per year in electricity alone, before any rebate.
Use the LED Savings Calculator to model your specific situation with your state tariff and actual fitting count.
Calculate your office LED upgrade savings
Enter your existing lamp type, hours of use and state to get a payback period with your actual electricity tariff.