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At dusk, a dark fence line turns a backyard into guesswork, and the best solar post cap lights with adjustable base turn that line into a lit edge without wiring. The short answer: the INDARUN light leads on stated brightness, the kolpop light leads on pack size and color choices, and the aluminum and metal lights lead on build. We compared the picks on brightness, fit, color modes, weather codes and warranty terms, using only what each listing states.
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Quick picks
Best Overall INDARUN WS163: 120 lumens with an adjustable base for 3.5 to 5.5 inch posts Check price on Amazon
12-Pack Pick kolpop FL30: 16 LEDs, 3 color temperatures and 2 brightness levels Check price on Amazon
Aluminum Build APONUO TZ38: Aluminum and glass build with IP65 stated and dual color modes Check price on Amazon
Metal and Glass VOLISUN Metal Glass: Metal shell and glass body with a universal adjustable base Check price on Amazon
Glass Design SIEDiNLAR Glass 2 Pack: Pebbled glass lens with warm and cool white modes Check price on Amazon
The picks
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 | INDARUN WS163 | 9.7/10 | Buy on Amazon |
| 2 | kolpop FL30 | 9.6/10 | Buy on Amazon |
| 3 | APONUO TZ38 | 9.6/10 | Buy on Amazon |
| 4 | VOLISUN Metal Glass | 9.6/10 | Buy on Amazon |
| 5 | SIEDiNLAR Glass 2 Pack | 9.5/10 | Buy on Amazon |

INDARUN WS163
A 6 pack of solar post cap lights with an adjustable base for 3.5 to 5.5 inch posts, 120 lumens and dual color modes.
Pros
- 120 lumens stated from 12 LEDs
- Adjustable base for 3.5 to 5.5 inch posts
- 1500mAh battery stated, with a claim of up to 24 hours of light
- Dual color modes with a dusk to dawn sensor
Cons
- Base note rules out hollow posts larger than 4.5 inches
- No stated figure for the temperature range, only a wide range claim
- 6 pack only, no smaller pack stated
- No stated lumen figure for each color mode separately
Detailed Review
The listing states 120 lumens from 12 SMD2835 LEDs, a 1500mAh battery, an adjustable base of 4.5x4.5 inches fitting posts from 3.5 to 5.5 inches, dual color modes, IP65, a dusk to dawn sensor and a 12-month warranty, at 4.5 x 4.5 x 3.5 inches in a 6 pack. It claims up to 24 hours of light after 6 to 8 hours of charging, and it states a temperature range in words without figures. The fit claim narrows in the fine print: the light is not suitable for hollow posts larger than 4.5 inches, so a hollow 5x5 post should not rely on the headline fit range.
Who it's for: readers who want the top stated brightness figure with a wide adjustable base. Who should skip it: readers with hollow posts larger than 4.5 inches, or readers who need a stated temperature figure.
Its Solar Score of 9.7/10 comes from performance 32/35, build 22/25, value 21/25, safety 8/10 and warranty 2/5: 85 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Brightness | 120 lumens |
|---|---|
| LEDs | 12 SMD2835 |
| Battery | 1500mAh |
| Fit | 3.5 to 5.5 inches |
Figures as published on the retailer listing, collected 25 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 stated, so safety scores 8 of 10. 12-month warranty. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Outdoor solar lights. Treat lumens, run time and weather ratings as the maker's figures, place the panel where it gets direct sun, and replace batteries only with the type the maker specifies.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

kolpop FL30
A 12 pack of solar post cap lights with 16 LEDs, 3 color temperatures, 2 brightness levels and IP65 stated.
Pros
- 12 pack, the largest pack here
- 16 LEDs with 3 color temperatures
- 2 brightness levels at 100% and 50%
- 2 years warranty stated, the joint longest term here
Cons
- Fits only 4x4 and 3.5x3.5 posts
- No lumen figure stated
- Spec table dimensions of 1 x 1 x 1 inches cannot be the fixture size
- No stated battery capacity
Detailed Review
The listing states a 12 pack of solar post cap lights with 16 LEDs, soft warm white, cool white and natural daylight modes, brightness levels of 100% and 50%, an energy conversion rate of up to 22% and IP65, with a 2 years warranty. It fits only 4x4 and 3.5x3.5 wood or vinyl posts and warns that no other size fits. The spec table lists dimensions of 1 x 1 x 1 inches, which cannot describe a fixture made for 3.5 and 4 inch posts, so the title and bullets fit figures should be trusted over that spec table line.
Who it's for: readers covering many 4x4 posts who want color and brightness choices. Who should skip it: readers with 5x5 or 6x6 posts, or readers who need a stated lumen figure.
Its Solar Score of 9.6/10 comes from performance 29/35, build 20/25, value 21/25, safety 8/10 and warranty 3/5: 81 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| LEDs | 16 |
|---|---|
| Colors | Soft Warm White, Cool White, Natural Daylight |
| Brightness levels | 100% and 50% |
| Fit | 4x4 and 3.5x3.5 only |
Figures as published on the retailer listing, collected 25 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 stated, so safety scores 8 of 10. 2 years. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Outdoor solar lights. Treat lumens, run time and weather ratings as the maker's figures, place the panel where it gets direct sun, and replace batteries only with the type the maker specifies.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

APONUO TZ38
A 6 pack of aluminum and glass solar post cap lights with an adjustable base, dual color modes and IP65 stated.
Pros
- Aluminum and glass build stated
- Adjustable base for 3.5 to 5.5 inches
- Dual color modes, warm and cool white
- IP65 stated with a dusk to dawn sensor
Cons
- Title states 6500K while bullets state 6501K for cool white
- 20 lumens stated, well below the top figure here
- No stated battery capacity
- No stated LED count beyond a single light source line
Detailed Review
The listing states a 6 pack of aluminum and glass solar post cap lights with an adjustable base from 3.5 to 5.5 inches for 4x4, 5x5 and 6x6 wood posts and 4x4 and 5x5 vinyl posts, IP65, a dusk to dawn sensor, 20 lumens and a 1 year warranty, at 5.12 x 5.12 x 4.72 inches. It claims 10 to 12 hours of light after 4 to 6 hours of charging. The cool white figure conflicts within the listing: the title states 6500K while the bullets state 6501K, so either figure should be quoted with care.
Who it's for: readers who want an aluminum and glass build with a wide adjustable base. Who should skip it: readers who need the top stated brightness figure or a stated battery capacity.
Its Solar Score of 9.6/10 comes from performance 28/35, build 22/25, value 20/25, safety 8/10 and warranty 2/5: 80 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Colors | 3000K warm white, 6500K cool white |
|---|---|
| Runtime claim | 10 to 12 hours |
| Build | Aluminum and glass |
| Fit | 3.5 to 5.5 inches |
Figures as published on the retailer listing, collected 25 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 stated, so safety scores 8 of 10. 1 year warranty. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Outdoor solar lights. Treat lumens, run time and weather ratings as the maker's figures, place the panel where it gets direct sun, and replace batteries only with the type the maker specifies.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

VOLISUN Metal Glass
A 2 pack of metal and glass solar post cap lights with an Edison bulb style, a universal adjustable base and IP64 stated.
Pros
- Metal shell and glass body stated
- Universal base from 3.5x3.5 to 6x6 posts
- Warm and cool white modes at 3000K and 6000K
- 2 years warranty stated, the joint longest term here
Cons
- IP64 stated, below the IP65 lights here
- 20 lumens stated, well below the top figure here
- Base is plastic while the cover is metal
- Listed dimensions of 10 x 10 x 5.5 inches are large for a post cap
Detailed Review
The listing states a 2 pack of metal and glass solar post cap lights with an Edison bulb style, warm white at 3000K and cool white at 6000K, 20 lumens, IP64, a universal plastic base fitting posts from 3.5x3.5 to 6x6, and a 2 years warranty, at 10 x 10 x 5.5 inches and 2.4 pounds. It asks for 8 hours of direct sunlight before first use and warns against strong artificial light over the sensor area. The base material differs from the cover: the cover is metal textured while the base itself is plastic, so the build should be read as mixed, not all metal.
Who it's for: readers who want a metal and glass look with the widest stated base range. Who should skip it: readers who need IP65 stated or the top stated brightness figure.
Its Solar Score of 9.6/10 comes from performance 27/35, build 21/25, value 20/25, safety 7/10 and warranty 3/5: 78 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Colors | 3000K and 6000K |
|---|---|
| Brightness | 20 lumens |
| Fit | 3.5x3.5 to 6x6 |
| Build | Metal and glass |
Figures as published on the retailer listing, collected 25 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP64 stated, so safety scores 7 of 10. 2 years. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Outdoor solar lights. Treat lumens, run time and weather ratings as the maker's figures, place the panel where it gets direct sun, and replace batteries only with the type the maker specifies.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

SIEDiNLAR Glass 2 Pack
A 2 pack of solar post lights with a pebbled glass lens, warm and cool white modes and a rotatable, detachable base.
Pros
- Pebbled glass lens with decorative light patterns stated
- Rotatable and detachable base for posts or flat surfaces
- Three base adapters for 4x4, 5x5 and 6x6 posts
- UV-resistant ABS housing stated
Cons
- No IP code stated
- 15 lumens stated, the lowest stated figure here
- No stated runtime figure
- 2 pack only, no larger pack stated
Detailed Review
The listing states a 2 pack of solar post lights with a pebbled glass lens, 4 LEDs, 15 lumens, warm white at 3000K and cool white at 6000K, a rotatable and detachable base, three base adapters for 4x4, 5x5 and 6x6 posts with actual figures of 3.5, 4.5 and 5.5 inches, a 1.2V 1000mAh battery and a 1 year warranty, at 6.3 x 6.3 x 3.85 inches and 2.2 pounds. The spec table gives a water resistance level but no IP code, so no IP figure should be quoted for this light. The title also names a glass design for decks, fences and patios, which matches the bullets.
Who it's for: readers who want a glass look with a detachable base for posts or flat surfaces. Who should skip it: readers who need a stated IP code or a brighter stated light.
Its Solar Score of 9.5/10 comes from performance 26/35, build 21/25, value 20/25, safety 3/10 and warranty 2/5: 72 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Brightness | 15 lumens |
|---|---|
| LEDs | 4 |
| Colors | 3000K and 6000K |
| Fit | 4x4, 5x5 and 6x6 |
Figures as published on the retailer listing, collected 25 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Water resistance level stated, no IP code stated, so safety scores 3 of 10. 1 year. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Outdoor solar lights. Treat lumens, run time and weather ratings as the maker's figures, place the panel where it gets direct sun, and replace batteries only with the type the maker specifies.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
More picks to compare
VOLISUN Metal Glass 1 PackMetal and glass design in a single-light pack with adjustable baseCheck on Amazon
VOLISUN Metal Glass 4 PackMetal and glass design in a four-light pack with adjustable baseCheck on Amazon
JOFIOS TZ39 8 PackEdison bulb design with 3 color temperatures and 2 brightness levelsCheck on Amazon
ONLSITY Single LightSingle light with 50 lumens and 3 color temperatures for 4×4 and 5.5×5.5 postsCheck on Amazon
Compare the picks
| Post Cap Light | Solar Score | Brightness | Fit | Weather | Warranty | Amazon |
|---|---|---|---|---|---|---|
| INDARUN WS163 | 9.7/10 | 120 lumens | 3.5 to 5.5 inches | IP65 | 12-month | View on Amazon |
| kolpop FL30 | 9.6/10 | Not stated | 4×4 and 3.5×3.5 only | IP65 | 2 years | View on Amazon |
| APONUO TZ38 | 9.6/10 | 20 lumens | 3.5 to 5.5 inches | IP65 | 1 year | View on Amazon |
| VOLISUN Metal Glass | 9.6/10 | 20 lumens | 3.5×3.5 to 6×6 | IP64 | 2 years | View on Amazon |
| SIEDiNLAR Glass 2 Pack | 9.5/10 | 15 lumens | 4×4, 5×5 and 6×6 | Water resistance level, no IP code | 1 year | View on Amazon |
Specifications are manufacturer rated as listed, collected 25 October 2026.
How we scored them
The Solar Score weighs performance, build, value, safety and warranty. For post cap lights, safety means a stated weather code and a build the listing describes for outdoor use: three lights state IP65, one states IP64, and one states a water resistance level with no IP code stated. All five state a warranty term, from a 12-month term to 2 years. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| INDARUN WS163 | 9.7 | 32 | 22 | 21 | 8 | 2 |
| kolpop FL30 | 9.6 | 29 | 20 | 21 | 8 | 3 |
| APONUO TZ38 | 9.6 | 28 | 22 | 20 | 8 | 2 |
| VOLISUN Metal Glass | 9.6 | 27 | 21 | 20 | 7 | 3 |
| SIEDiNLAR Glass 2 Pack | 9.5 | 26 | 21 | 20 | 3 | 2 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
How to choose the best solar post cap lights with adjustable base
Start from post size, not brightness
Fit decides the shortlist before brightness does. The INDARUN and APONUO lights state an adjustable base for posts from 3.5 to 5.5 inches, while the kolpop light fits only 4×4 and 3.5×3.5 posts, so a 5×5 post rules it out. The SIEDiNLAR light uses three base adapters for 4×4, 5×5 and 6×6 posts, and the VOLISUN light states a universal base from 3.5×3.5 to 6×6 posts. Measure the actual post, not the nominal size, since the SIEDiNLAR listing gives actual figures of 3.5, 4.5 and 5.5 inches for those nominal sizes. For a 4×4 post, the best solar post cap lights 4×4 white guide covers white options as well.
Brightness and color modes
Brightness figures vary widely here, and one light states none at all. The INDARUN light states 120 lumens from 12 LEDs, the APONUO and VOLISUN lights state 20 lumens each, and the SIEDiNLAR light states 15 lumens from 4 LEDs. The kolpop light states no lumen figure, so its brightness cannot be ranked against the others from the listing alone. Color choice is wider: the kolpop light offers 3 color temperatures with 2 brightness levels at 100% and 50%, the INDARUN, APONUO, VOLISUN and SIEDiNLAR lights each offer warm and cool white modes, and the kolpop light adds a natural daylight mode.
Weather codes and build
Build splits into glass and plastic designs. The APONUO light pairs aluminum with glass, the VOLISUN light pairs a metal shell with a glass body on a plastic base, and the SIEDiNLAR light pairs a pebbled glass lens with a UV-resistant ABS housing. The INDARUN light uses ABS and PC materials, and the kolpop light uses ABS. On weather codes, the INDARUN, kolpop and APONUO lights state IP65, the VOLISUN light states IP64, and the SIEDiNLAR light states a water resistance level with no IP code stated. A reader who wants a stated code should pick from the four lights that name one.
Read the warranty lines closely
Warranty terms here run from a 12-month term to 2 years, and the wording matters. The kolpop and VOLISUN lights state 2 years, the APONUO and SIEDiNLAR lights state 1 year, and the INDARUN light states a 12-month warranty. A 12-month term and a 1 year term cover the same length in different words, so compare the number, not the phrasing. Also check the contradictions flagged in each review, such as the INDARUN hollow post note and the APONUO color figure, before treating any single line as final. For the wider choice between wall and cap lights, see solar wall lights vs post cap lights.
Sizing Notes
- Match the stated post size to the base fit: 3.5 to 5.5 inches for the INDARUN and APONUO lights, 4×4 and 3.5×3.5 only for the kolpop light, and up to 6×6 for the SIEDiNLAR and VOLISUN lights.
- Match stated brightness to the spot: 120 lumens for the INDARUN light, 20 lumens for the APONUO and VOLISUN lights, and 15 lumens for the SIEDiNLAR light, with no lumen figure stated for the kolpop light.
- Match color modes to the setting: warm and cool white on four lights, plus a natural daylight mode on the kolpop light.
- Count posts against pack size: packs here run 12, 6 and 2 lights, so a long fence line may need more than one pack.
Frequently Asked Questions
Which light here states the highest brightness?
The INDARUN light states 120 lumens, ahead of the APONUO and VOLISUN lights at 20 lumens each and the SIEDiNLAR light at 15 lumens. The kolpop light states no lumen figure.
Which lights fit a 6×6 post?
The SIEDiNLAR light, with adapters for 4×4, 5×5 and 6×6 posts, and the VOLISUN light, with a universal base from 3.5×3.5 to 6×6 posts. The INDARUN and APONUO lights state fit only to 5.5 inches, and the kolpop light fits only 4×4 and 3.5×3.5 posts.
Do all five state a weather code?
No. The INDARUN, kolpop and APONUO lights state IP65, and the VOLISUN light states IP64. The SIEDiNLAR light states a water resistance level with no IP code stated.
Which lights state a 2 year warranty?
The kolpop and VOLISUN lights state 2 years. The APONUO and SIEDiNLAR lights state 1 year, and the INDARUN light states a 12-month warranty.
Related guides
See every Solar Lights, Cameras and Fans guide. Also see our best solar post cap lights under 10 and best high lumen solar post light.




