About PWC Lights
PWC Lights is a free set of decorating calculators for Prince William County homeowners — strands, cords, clips, décor counts, energy, and related holiday planning for Christmas and Halloween. Community light and trick-or-treat maps are coming later this season.
What this site is
- Decorating calculators — browser tools for light math (no account; inputs stay on your device).
What we are not
- Not a lighting installer or quote service.
- Not a paid-listings or sponsored-placement site.
- Not an electrical-code stamp or professional inspection.
The site may show Google AdSense ads to help keep the calculators free. Details are on the Privacy page.
How calculators help before you buy
The decorating calculators turn porch measurements into strand counts, clip counts, timer zones, blower CFM headroom, luminaria candle packs, porch fit checks, and similar shopping numbers so you can buy once instead of making a second hardware-store run. Each page shows the formula, a worked example, and the assumptions behind the estimate. Inputs stay in your browser — they are not uploaded anywhere. Use them alongside product labels and outlet ratings; they are planning aids, not an electrical inspection or install quote.
Safety and planning notes
Outdoor décor shares space with walkways, GFCI outlets, ladders, open-flame lanterns, and wind. Prefer LED where you can, keep cords out of door swings, stake inflatables and posed props so they cannot tip into the sidewalk, and follow manufacturer connect limits on light sets. Fog, projectors, and timers are fun — give them dry, ventilated placements and never leave open flames unattended. If a calculator result and a product rating disagree, trust the rating.
Season rhythm for Prince William County
Late October is for haunted porches, fog paths, and candy bags; late November through New Year is for lighted eaves, blow molds, timers, and window candles. Plan early so cords, stakes, and timers are ready for opening weekend, and adjust timer schedules when school nights change your evenings. Calculators stay useful year-round for shopping lists — measure eaves and rails once, then reuse the numbers when you replace burnt strands or add a second timer zone.
Newer calculators
Recent additions cover ladder clip staging by rung, graveyard fog-fan airflow, wreath S-hook counts, candy-chute slope, spider-web corner kits, lighted arch walk-through clearance, cobweb spray can estimates, spotlight stake depth, Christmas village street length, and hanging-ghost clearance. Use them when the shopping question is “will it clear / how many cans / how deep to stake,” not only “how many light strands.”
Calculators with a county focus
The calculators are planning aids for Prince William County homes, not install quotes. Do a measurement pass at home so porch cords, fog paths, and arch clearances are ready before opening night.