What Is the Equivalent Wattage for Energy Saving Bulbs?
M Gray asks

Lampshades are always labelled with a max tunsten bulb wattage.

If I have a lampshade which states e.g. max 100W (tungsten), what would be the equivalent max wattage for an energy saving bulb?

Remember when buying light bulbs was simple? You'd grab a 60W or 100W bulb and that was that. These days, the lighting aisle looks like a maths exam – lumens, watts, kelvins everywhere you turn. Let me break it down for you.

The good news? Those energy-saving bulbs genuinely do save you money. A typical LED uses about 85% less electricity than old-school incandescent bulbs. That's not marketing fluff – it's real savings on your electricity bill.

Quick conversion guide

When you're replacing your old bulbs, these alternatives give you similar brightness levels:

  • Your old 25W bulb? Replace with a 2-4W LED (gives you 200-300 lumens)
  • 40W bulb = 4-6W LED (400-500 lumens)
  • 60W bulb = 7-10W LED (700-900 lumens)
  • 100W bulb = 12-15W LED (1,200-1,500 lumens)

Lumens measure brightness, by the way. Higher lumens = brighter light. Simple as that.

Why LEDs won the lighting wars

You might spot some compact fluorescent lamps (CFLs) still hanging about in shops – those curly ones that take ages to warm up. Don't bother. LEDs have completely taken over, and for good reason. They last for many years (15,000-25,000 hours versus 1,000 for traditional bulbs), switch on instantly, and work with dimmer switches.

Back in 2018, EU regulations banned most halogen bulbs as part of energy efficiency measures – rules the UK still follows post-Brexit. CFLs have largely disappeared from shelves too, replaced by superior LED technology. It's LED or nothing these days.

Before you rush out shopping though, check your existing fittings. Older light fixtures might need adapters or different bulb bases to work with modern LEDs.

Your situation may be slightly different. ask a question below ↓ and our editorial team will reply with our advice.

Smart bulbs – worth the faff?

Smart LED bulbs connect to your WiFi and work through apps on your phone or voice assistants like Alexa and Google Home. Control them from anywhere, set timers, dim them from the sofa, even change colours if you fancy mood lighting. They cost more upfront – think £15-30 per bulb versus £3-5 for standard LEDs – but they're brilliant for hard-to-reach lights or if you're always leaving lights on.

My mate swears by them after installing one in her porch. No more fumbling for keys in the dark – the light switches on automatically when she gets home.

Shopping tips that actually help

Energy labels can be confusing. While the guide suggests looking for A or B ratings, most modern LEDs actually achieve A+ or A++ ratings, significantly outperforming older standards. The environmental benefits are substantial too – less energy use means lower carbon emissions from power stations.

For the right ambiance, 'warm white' (2700-3000K) gives that cosy traditional bulb glow. Cool white (4000K+) works better in kitchens and bathrooms where you want crisp, clear light.

Prices have plummeted recently. Decent LEDs cost under a fiver now, and each bulb saves roughly £3-5 per year in electricity. Multiply that by every bulb in your house, and you're looking at real savings. Some councils even run discount schemes – worth checking your local authority website.

One last thing – if you work from home and your electricity bills are climbing, you might qualify for a business energy tariff. Could work out cheaper than residential rates, especially if you're running equipment all day.