LED Lighting Savings Calculator

Calculate energy savings, cost reductions, and carbon footprint reduction from switching to LED lighting

Calculate LED Savings

See how much you can save by switching to LED lighting

lights

Total number of lights you want to replace

hours/day

Average hours these lights are on each day

Advanced Options
W
W
£/kWh

UK average is around £0.25-0.35/kWh (check your bill)

£

Cost per LED bulb

Why Switch to LED Lighting?

LED (Light Emitting Diode) technology has revolutionized lighting, offering significant advantages over traditional incandescent, halogen, and CFL bulbs.

Key Benefits of LED Lighting

  • Up to 90% Energy Savings - LEDs use a fraction of the energy of incandescent bulbs for the same light output
  • 25,000+ Hour Lifespan - Last 25x longer than incandescent bulbs, reducing replacement costs and maintenance
  • Lower Heat Output - LEDs stay cool, reducing fire risk and air conditioning costs in summer
  • Instant Full Brightness - No warm-up time unlike CFLs
  • Environmentally Friendly - No mercury, reduced CO₂ emissions, and fully recyclable
  • Better Light Quality - Modern LEDs offer excellent color rendering and dimmability
  • Cost Effective - Despite higher upfront cost, savings repay investment within 6-18 months typically

Real-World Savings Example

Typical UK Home (10 lights, 5 hours/day):

  • • Switching from 60W incandescent to 8W LED bulbs
  • • Annual energy savings: ~950 kWh
  • • Annual cost savings: £266 (at £0.28/kWh)
  • • CO₂ reduction: ~221kg per year
  • • Payback period: ~2.5 months
  • • 25-year lifetime savings: £6,000+

LED vs Traditional Bulbs Comparison

FeatureLEDCFLHalogenIncandescent
Power (800 lumens)8-10W14-16W42-50W60W
Lifespan25,000h8,000h2,000h1,000h
Annual Cost (5h/day, £0.28/kWh)£4.63£8.11£25.52£30.71
Typical Bulb Cost£3-8£2-5£1-3£1-2
Heat OutputVery LowLowVery HighVery High
MercuryNone ✓Yes ✗None ✓None ✓
DimmableYes ✓SomeYes ✓Yes ✓

Understanding Bulb Equivalents

Old → LED
  • 25W Incandescent → 3-4W LED
  • 40W Incandescent → 5-6W LED
  • 60W Incandescent → 8-9W LED
  • 75W Incandescent → 10-12W LED
  • 100W Incandescent → 13-15W LED
Halogen → LED
  • 20W Halogen → 2-3W LED
  • 35W Halogen → 4-5W LED
  • 50W Halogen → 6-7W LED
  • 75W Halogen → 9-11W LED