Compare the running cost of old bulbs against LEDs.
Multiplying each bulb's wattage by annual use and the number of bulbs gives the yearly cost. LEDs use far fewer watts for the same light, so the difference is the savings. Lighting a full house with old bulbs quietly drives a large recurring charge that switching to LEDs mostly eliminates.
Lightbulb Cost vs LED
Cost = watts x hours x days x bulbs x rate / 1000
Cost = watts x hours x days x bulbs x rate / 1000 Multiplying each bulb's wattage by annual use and the number of bulbs gives the yearly cost. LEDs use far fewer watts for the same light, so the difference is the savings.
Lighting a full house with old bulbs quietly drives a large recurring charge that switching to LEDs mostly eliminates.
This calculator takes 5 inputs: Old bulb watts, LED watts, Number of bulbs, Use per day, Electricity rate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.