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    Converting to LED Downlights: What It Costs and Saves in Johannesburg

    Old halogen downlights are power-hungry and a fire risk. What converting to LED costs, how much you save on your Johannesburg electricity bill, and why an electrician should do it.

    6 June 2026 6 min read
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    If your home still has the old 50W halogen downlights, you are paying to heat your ceiling. Converting to LED is one of the easiest wins for both your electricity bill and your home's fire safety. Here is the maths.

    The saving is dramatic

    An LED downlight draws around 5W versus a halogen's 50W — 80–90% less power for the same light. In a home with 30 downlights, that adds up to hundreds of rands a year, and because LEDs last for years you also stop the endless bulb-replacement cycle.

    It is also a safety upgrade

    Halogen downlights run extremely hot and have been linked to ceiling and roof-insulation fires, particularly where insulation has been laid over the fittings. Cool-running LEDs remove that risk entirely.

    Why not just swap the bulbs?

    Sometimes a retrofit LED lamp drops straight in — but many halogen fittings use transformers that are incompatible with LEDs and cause flickering, buzzing or early failure. A proper conversion replaces or bypasses the transformer so the LEDs run reliably. See our LED conversion service.

    Pair it with the bigger picture

    LED conversion is the cheapest step in a broader energy-efficiency plan that can include a GeyserWise controller and solar. Start small, save immediately. Get a quote for a whole-house conversion.

    Frequently Asked Questions

    An LED downlight uses roughly 80 to 90 percent less power than an old halogen — about 5W versus 50W. In a home with 30 downlights running a few hours a day, the saving runs into hundreds of rands a year, and LEDs last far longer so you also stop replacing bulbs constantly.

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