The ballast is still your problem
When you switch a T8 fluorescent tube for an LED tube, there are two ways to do it. This distinction matters more than anything else in the quote.
Type A โ ballast-compatible: The LED tube drops straight in and runs off your existing magnetic or electronic ballast. Five minutes per fitting, no rewiring. The LED tube is new. The ballast is still there, doing what it always did.
Type B โ ballast bypass (direct wire): The ballast gets disconnected and removed. The fitting is rewired so the LED tube runs directly off mains. Takes longer per fitting and requires a licensed electrician to do the wiring. The ballast is gone.
Here's the thing about Type A: the ballast was always the most likely thing to fail in a fluorescent fitting. That flicker you got before a tube finally gave up? Usually the ballast on its way out, not the tube. You've swapped the tube for an LED version โ great โ but you've left the part that causes the headaches right where it was.
When the ballast eventually dies, your shiny LED tube goes dark. You're back to calling an electrician, and now the job needs rewiring anyway โ you've just added a service call to the cost of what should have been done properly in the first place.
Type B eliminates the ballast entirely. The LED tube runs direct. No ballast to fail, no flickering on cold mornings, no compatibility issues between old magnetic gear and new LED electronics. That's the installation that delivers what people actually expect from LED โ a fitting that runs reliably for a decade with minimal drama.
Before any T8 to LED quote goes ahead, ask one question: "Is this a Type A or Type B installation?" If the answer is Type A, ask why the ballasts aren't being removed. If the answer is that it takes longer and costs more โ that's exactly correct, and it's exactly worth it.
Why VEU installs often go Type A
Victoria's Energy Upgrades program calculates credits partly based on the number of fittings upgraded and the wattage reduction achieved. More fittings per day means more credits per day. A Type A T8 swap is fast โ an experienced installer can move through a lot of fittings in a shift when all they're doing is pulling out tubes and pushing in new ones.
Type B takes significantly longer per fitting. Each one needs to be rewired, which is a licensed electrical task and can't be rushed. On a scheme where the installer recoups their cost through VEU credits rather than a direct charge to you, there's a clear financial incentive to favour the fast install wherever the scheme rules allow it.
This isn't a shot at every VEU installer โ plenty of them do the job properly. But "no upfront cost" and "done right" aren't always the same thing. If your quote or agreement doesn't explicitly state Type B (ballast bypass), there's a decent chance you're getting Type A. Ask before it starts, not after you're watching a tube flicker six months later because a 1990s ballast decided it was done.
| Installation type | How it works | Ballast stays? | Long-term reliability |
|---|---|---|---|
| Type A (ballast-compatible) | LED tube drops in, runs off existing ballast | Yes โ ๏ธ | Limited by ballast life |
| Type B (direct wire) | Ballast removed, fitting rewired to mains | No โ | LED driver lifespan only |
The lm/W numbers โ same story as always
A standard 36W T8 fluorescent tube produces around 3,350 lumens. That's your benchmark โ whatever LED tube goes in needs to match that output, otherwise the space ends up dimmer than it was before.
LED T8 tubes are commonly marketed at 150 lm/W or higher. Here's what "18W LED replaces 36W fluorescent" actually means in practice:
For an 18W LED tube to genuinely replace a 36W T8, it would need to produce 186 lm/W. No commercially available T8 LED tube reliably achieves that in the field. The tubes that come closest are top-tier products with premium drivers โ not the ones that find their way into volume VEU installs.
A 24W LED tube at a realistic 130 lm/W delivers 3,120 lumens โ much closer to the original. That's the wattage you should be checking against, not the 18W figure that makes the energy saving look more impressive on paper.
In an office or retail space designed around a specific lux level, a 35% light output reduction isn't just uncomfortable โ it's likely to fall outside the lighting standards your building is supposed to meet. An underlit workplace is a productivity issue and potentially a compliance one.
For speccing a T8 replacement, use 120โ130 lm/W as your working figure โ regardless of what the catalogue says. Divide your existing tube's lumen output by that number to get the LED wattage you actually need. For a standard 36W T8 at 3,350 lm: 3,350 รท 125 = 26.8W. A 25โ28W LED tube, not an 18W one.
What to ask before you commit
Whether it's a VEU-funded job or a straight commercial upgrade, these are the questions worth getting answered in writing before anyone touches a fitting:
"Type A or Type B?" If it's Type A, ask what happens when a ballast fails post-installation and who covers the cost of the rewire at that point.
"What's the lumen output of the tube being installed, not just the wattage?" Get the model number, look up the spec sheet, divide lumens by watts, and apply a 10% discount to get the realistic field figure.
"Is this tube on the VEU approved product list, and at what minimum specification does it qualify?" The scheme has entry-level requirements โ make sure you're getting something that exceeds them rather than a fitting that just scrapes through and goes out of production in 18 months.
"Who do I call if a tube fails in year two, and is the manufacturer still likely to be trading?" A lot of LED tube brands in Australia are importers with no local manufacturing. If the business closes, the warranty is gone with it.
The saving is still real โ when it's done right
None of this is an argument against doing the upgrade. T8 fluorescent to LED, properly installed with Type B direct-wire and a quality tube, is one of the best-value LED projects available in Australian commercial lighting. The numbers are solid:
That payback gets shorter in higher-tariff states โ a South Australian office at 42c/kWh is looking at well under two years on a properly specified job. And unlike a Type A install that still has a ballast ticking away in every fitting, a Type B job is genuinely set-and-forget for a decade.
Free is a great price โ right up until the thing you got for free needs fixing. A quality T8 LED upgrade might cost a bit more upfront than the no-cost VEU option, but it only needs doing once.