Back Porch Light Fixtures: Sizing and Buying Considerations | Scale, Rating, Placement

Size a back porch wall light at about one-third of the door height for a single fixture, or one-fourth each for two flanking fixtures, and use a wet-rated fixture wherever rain can reach it.

An undersized porch light is the most common outdoor lighting mistake and expensive to fix after drilling. The numbers below come from sizing guidance published by The Home Depot and Lamps Plus, plus the UL location ratings explained by Lumens.

Three things decide the purchase: fixture size, mounting height, and rain rating.

Sizing The Fixture To Your Door

A single wall lantern should measure roughly one-third the height of your door; two fixtures flanking the same door each drop to about one-fourth.

So an 80-inch door calls for one fixture around 26 inches tall — a substantial lantern, not the 12-inch sconce most people picture. Split across two fixtures, each comes in near 20 inches. That surprises buyers, which is why so many porch lights end up looking undersized.

Before ordering, tape the fixture’s dimensions on the wall and step back across the yard. The silhouette test costs nothing and catches a bad scale call instantly. Also check clearance to any overhang or ceiling.

Where To Mount It

Center the fixture about 66 inches above the threshold — roughly eye level, with some guides placing it between 60 and 65 inches — and put it on the handle side of the door for entry lighting. That places light where your keys and lock are and throws fewer shadows across the doorway.

One fixture gives a focused pool of light at the door. Two fixtures spread the wash wider and read as more formal — common for double doors or wider entries. Think about the beam before the bulb: delivered lumens, beam distribution, spacing, and surface color all change how bright the porch looks, and wattage alone tells you almost nothing.

Wet-Rated Or Damp-Rated

A wet-rated fixture is required anywhere rain, snow, spray, or wind-driven water can reach the light — uncovered porches, open decks, and exposed exterior walls. A damp rating only covers a covered or partially protected porch that never takes direct rain. Installing a damp-rated fixture in an exposed spot ends in a corroded socket or tripped breaker. Only a fixture marked “Suitable for Wet Locations” belongs in a wet location; the rating appears on the product marking and installation instructions.

I’ve narrowed the field to options that hold up outdoors; browse the best back porch lights we’ve tested for a short list.

The wet/damp terminology follows UL location ratings for lighting, which apply to U.S. residential fixtures. If your porch sits under a deep roof but catches blowing rain at the edges, treat that wall as wet — the rating assumes weather, not the roofline.

Quick Buying Checklist

• Measure the door height, then divide by 3 for one fixture or 4 for two.
• Tape the dimensions on the wall and view from a normal distance.
• Aim the mounting center at roughly 66 inches above the threshold.
• Match the rating to exposure: wet for open, damp only for covered.
• Compare lumens and beam spread, not wattage.
• Check finish against the siding in daylight.
• Buy the right number of fixtures with the right output.

Get the size range and rating right, and the fixture choice gets easy.