Coastline Lights
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Planning tool

Energy cost calculator.

Estimate the electricity cost of running your display, using the numbers you enter for bulb count, wattage, hours and your own utility rate.

This is an estimate based on the numbers you enter below — not a bill guarantee. Real electricity rates, tiered pricing, taxes and actual usage all vary by household and utility.

Use the roofline estimator's bulb count, or your own count.

Set automatically when you choose a bulb type above, or type your own — for example, from the bulb packaging.

For example, 6 hours a night. Up to 24 hours.

We don't assume a rate for you. Check a recent utility bill for your actual $/kWh rate — without it, we can't estimate a cost.

How this is calculated

Every figure below comes directly from what you entered above:

  • Total wattage = number of bulbs × watts per bulb
  • Daily kWh = (total wattage × hours per day) ÷ 1000
  • Monthly kWh = daily kWh × 30 days
  • Cost = kWh × your electricity rate

Nothing is looked up on your behalf — change any input and the estimate changes with it, and if you leave the rate blank, we don't guess one for you.

Want to talk through your options?

A design consultation can talk through display size, bulb choice and layout with you directly. Request a design consultation. The run-hours half of this arithmetic is the timer's job — our guide to timers and dusk-to-dawn scheduling covers it.

Request a design consultation.

Tell us about your home and we will put together a lighting design and a quote for it.

Request a Design Consultation Call 949-806-2333

Texting works too: 949-806-2333