Solar Fence Post Lights — Waterproof Solar Post Caps, Fits 4x4 Posts

These solar fence post lights are square post caps that sit on top of a 4x4 fence, deck, or garden post. A solar panel on the cap charges in daylight. At dusk the ribbed sides glow. No wiring, and you do not buy disposable batteries for nightly use — the cap is the lamp.

What they are

Each unit is a low square cap: panel on the lid, glowing ribbed band around the sides, and a base that drops onto a post. Photos show them on timber fence rails and on white vinyl posts. They mark a fence line, a deck rail, or garden posts after dark. They are post caps, not path stakes and not hanging lanterns.

They are a different product from 4x4 / 5x5 / 6x6 universal post-cap families. This listing fits 4x4 posts; the body states that 4x4 is the largest post size these caps fit. If you need other outdoor lighting shapes, see the Lights collection.

Colors and pack counts

Two options exist on the picker. Names below match those options exactly:

• Color — Black or White.
• Counts — 8 Pcs, 4 Pcs, or 16 Pcs (sold as those labels, not renamed packs).

Choose Black for timber that should stay dark during the day; choose White when the cap should match a white vinyl fence. A 4 Pcs run covers a short gate or a small deck; 8 Pcs is a typical fence line; 16 Pcs is a long rail or a driveway of posts. Mix is not a third color — you pick one color per line item.

Fit

Both finishes fit 4x4 wood posts (3.5 in actual) and 4x4 vinyl posts (4 in actual). 4x4 is the largest post these caps fit. They are not described as 5x5 or 6x6 caps.

On vinyl posts with a moulded 3.5 in base, remove that base first so the cap sits flush. Measure the actual post top before you order. A post that is larger than 4x4 will not take this cap.

Who they are for

Homeowners with 4x4 fence or deck posts who want the top of each post to glow without hiring an electrician. A deck stair rail, a front fence, or garden posts along a path. Renters who can set a cap on a post they already have.

They are post-top markers, not a flood for the yard. If you need light on the ground along a walk, use path lights from the same collection rather than these caps.

Modes and setup

Three light modes: warm, natural, and cool white, so you can match the rest of the yard. The current body does not name a switch location beyond those three modes; use the control on the cap as packed.

1. Confirm the post is a 4x4 (3.5 in actual wood, or 4 in actual vinyl). Remove a moulded vinyl base if it is in the way.
2. Set the cap on the post so it sits level. The panel on top must see the sky — a deep overhead structure that shades the cap all day will starve it.
3. Pick warm, natural, or cool white.
4. Give the panel a full day of sun before you judge the first night. They charge through the day and run from dusk.

Wipe pollen and snow off the panel. A dirty lid charges slowly.

Weather and runtime

They are listed as fully waterproof for year-round outdoor use in rain and snow. This listing does not publish an IP number, lumens, or battery mAh, so we do not invent those ratings. Waterproof here means a cap that lives on a post in weather, not a submersible light.

Runtime follows sun. An open fence line is the best case. Posts under a dense tree line or on the north face of a building will run shorter. That is normal for solar caps, not a defect in a single 4 Pcs, 8 Pcs, or 16 Pcs set.

FAQ

Do these fence post lights fit 6x6 posts?

No. The body states they fit 4x4 wood (3.5 in actual) and 4x4 vinyl (4 in actual), and that 4x4 is the largest post size these caps fit. Do not order them for a 5x5 or 6x6 post.

What colors and counts are sold?

Color: Black or White. Counts: 4 Pcs, 8 Pcs, and 16 Pcs. Those are the option names as they appear at checkout.

Do they need wiring or replacement batteries every night?

No. They charge in daylight and switch on at dusk. The body describes them as solar-powered with no wiring and no batteries to buy for ordinary night use.

What light colors can I set?

Three modes: warm, natural, and cool white.

Browse more outdoor lighting in the Lights collection.