Exterior-lighting field guide
Porch lanterns: wall, hanging, or post mount?
The mounting assembly defines the form. A wall lantern projects from a backplate and bracket, a hanging lantern descends from a ceiling canopy, and a post-top lantern seats on a standard or pier base. Each needs a different set of measurements before it can be identified or replaced confidently.
Name the complete assembly
Three mounting forms answer different conditions
| Form | Supporting hardware | Record first | Common fit question |
|---|---|---|---|
| Wall bracket | Wall plate plus a projecting arm or body support. | Backplate height and width; projection from wall to the body center and outer edge. | Will the plate cover the box and will the body clear trim, doors, and eaves? |
| Hanging lantern | Ceiling canopy with chain, links, or a rigid stem above the lantern. | Canopy diameter, body height and width, suspension length, and total installed drop. | Does the complete drop preserve headroom and keep the body within the protected porch area? |
| Post top | A bottom collar, base, or scroll assembly seated on a post, standard, or pier mount. | Base opening, outside base diameter, attachment method, body height, and widest spread. | Does the lantern base match the support and provide a secure route for the supply wiring? |
Dated comparisons
One 1927 catalog separates all three forms
Biddle-Gaumer’s Exterior Lighting Fixtures, catalogue No. 19 organizes lanterns by their supporting assemblies. Its printed dimensions show why the lantern body alone is insufficient for a fit decision.
Wall bracket
The plate records overall length, projection to the lantern center, wall-plate size, body diameter, and individual glass-panel dimensions.
Inspect the catalog plate →
Hanging lantern
The catalog gives a 48-inch overall length for each example while separately identifying the lantern body diameter and glass.
Inspect the catalog plate →
Post-top lantern
These examples list overall height, lantern diameter, and the base or scroll spread that meets the supporting standard.
Inspect the catalog plate →Measure the fixed support and the lantern separately
Photograph the fixture straight on, in profile, from below, and at the connection to the building or post. Place a ruler in the same plane as the part being measured. For a wall light, record both projection to the body center and maximum projection; the 1927 wall-lantern plate uses the centerline measurement, while modern listings may describe the outermost depth.
Record glass as its own component: panel count, visible opening, panel dimensions, texture, color, and how each piece is retained. Surviving glass and mounting hardware can be later replacements, so a similar body outline supports comparison without proving a maker attribution.
Include photographs of model numbers, foundry marks, labels, old fastener holes, and unused openings. An identification request is much easier to assess when those details accompany the overall views and measurements.
Outdoor installation
Is the porch damp or wet?
Assess moisture at the fixture’s actual position. A porch roof provides partial protection; wind-driven rain or splash can still reach a lantern near its edge.
- Damp location
- Periodic condensation or moisture in a partially protected position calls for a fixture marked suitable for damp or wet locations.
- Wet location
- Water dripping, splashing, or flowing against the fixture calls for a fixture marked suitable for wet locations.
Follow any mounting-orientation restrictions and the manufacturer’s sealing instructions. UL’s 2016 marking guide, printed page 25, notes 2–4 explains these location terms; note 22 covers orientation.
Photograph accessible labels and record the model, location marking, intended mounting position, and exposure with your fixture measurements. Leave concealed labels for the electrician. A catalog illustration documents the historic form; an altered antique needs an assessment of its present condition.
Current line-voltage outdoor luminaires are evaluated under UL 1598 with applicable wet- location requirements. Select a fixture whose marked location rating and installation instructions suit the actual exposure, and have questionable existing wiring, boxes, posts, or altered antique fixtures assessed by a qualified electrician. Review UL Solutions’ outdoor-lighting overview.
Current wall-lantern option
A reproduction with a clear bracket-mounted form
This current wall lantern has a tall enclosed body, seedy glass, and a visible bracket assembly that reads clearly beside the documented wall-mounted form. It is a modern Hinkley fixture, not a Biddle-Gaumer antique. Confirm its location rating, backplate, projection, finish, seller, price, and availability on Amazon before ordering.
As an Amazon Associate, Old House Lights earns from qualifying purchases. Prices and availability are shown on Amazon and may change.
Research sources
- Biddle-Gaumer Company, Exterior Lighting Fixtures: Standards, Post Lights, Lanterns, Bracket Lanterns, catalogue No. 19 (1927), scan positions 18, 31, and 36. Avery Architectural and Fine Arts Library, Columbia University Libraries; digitized by Internet Archive for the Building Technology Heritage Library. Open the complete catalog.
- UL Solutions, “Landscape and Outdoor Lighting,” current overview of outdoor luminaire categories and applicable safety standards. Open the UL overview.
- UL, Luminaires Marking and Application Guide (2016), printed page 25, notes 2–4 (damp and wet locations, installation instructions), and printed page 27, note 22 (orientation). PDF positions 27 and 29 respectively. Open the marking guide.