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The best solar post cap lights 4×4 white pick starts with fit: your post is 4×4 wood (actually 3.5×3.5 inches) or vinyl (actually 4×4), and the cap must sit square on top. We compared four white solar post cap lights on what their listings state: LED counts, color modes, water ingress codes and warranty terms. The T-SUN 6-pack leads on LED count and warranty, with the Brightever 12-pack next on value.
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Quick picks
Best Overall T-SUN 4×4 Post Cap Lights: 24 LEDs with IP65 stated and 2-year warranty. Check price on Amazon
Best Value Pack Brightever 4×4 Post Cap Lights: 12-pack with monocrystalline panels and IP65 stated. Check price on Amazon
Best Glass Finish SIEDiNLAR 4×4 Post Cap Lights: Glass shades with warm/cool modes and 15 lumens stated. Check price on Amazon
Best Color Modes Peasur 4×4 Post Cap Lights: 3 colors with 2 brightness levels and 4-pack value. Check price on Amazon
The picks
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 | T-SUN 4x4 Post Cap Lights | 9.7/10 | Buy on Amazon |
| 2 | Brightever 4x4 Post Cap Lights | 9.7/10 | Buy on Amazon |
| 3 | SIEDiNLAR 4x4 Post Cap Lights | 9.6/10 | Buy on Amazon |
| 4 | Peasur 4x4 Post Cap Lights | 9.6/10 | Buy on Amazon |

T-SUN 4x4 Post Cap Lights
A 6-pack of white 4x4 solar post cap lights with 24 LEDs, 3000K/6000K modes, IP65 and a 2-year warranty stated.
Pros
- 24 high-brightness LEDs stated, the most here
- IP65 stated with heavy-duty PP plastic
- 10-12 hours of light after 6-8 hours of charging stated
- 2-year warranty with 24/7 US support stated
Cons
- Fits 4x4 posts only, no 5x5 or 6x6
- No lumen figure is stated
- Only warm and cool white, no neutral
- 3.1-pound 6-pack weight adds shipping heft
Detailed Review
The listing states a 6-pack of white solar post cap lights for 4x4 wooden and vinyl posts, with 24 high-brightness LEDs in warm white (3000K) or cool white (6000K), a transparent lens, and IP65 stated with heavy-duty PP plastic built for rain, snow and extreme weather. It lists a 6-8 hour charge for 10-12 hours of automatic dusk-to-dawn light, and includes mounting hardware and a manual. The listing states a 2-year warranty with 24/7 US support.
Who it's for: decks, fences and patios that want the highest LED count with IP65 and a 2-year warranty. Who should skip it: anyone with 5x5 or 6x6 posts.
Its Solar Score of 9.7/10 comes from performance 32/35, build 20/25, value 21/25, safety 7/10 and warranty 4/5: 84 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| LEDs | 24 stated |
|---|---|
| Modes | 3000K / 6000K |
| Water code | IP65 stated |
| Runtime | 10-12h stated |
Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 stated, so safety scores 7 of 10. 2-year warranty with 24/7 US support stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 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.

Brightever 4x4 Post Cap Lights
A 12-pack of white 4x4 solar post cap lights with 16 LEDs, warm/cool modes, IP65 and a 1-year warranty stated.
Pros
- 12-pack value with monocrystalline panels at 30%+ stated
- IP65 stated with ABS and PP build
- 4-6 hour ultra-fast solar charging stated
- Water-ripple shade spreads light widely stated
Cons
- 1-year seller warranty stated
- No lumen figure is stated
- Needs 1-2 days of sun on arrival for a full charge stated
- Must remove the 3.5x3.5 adapter for vinyl posts
Detailed Review
The listing states a 12-pack of white solar post cap lights for 3.5x3.5 wood and 4x4 vinyl posts, with 16 LEDs in warm white (3000K) or cool white (6000K), a water-ripple shade that widens the spread, and IP65 stated with ABS and PP build. It lists monocrystalline panels with a 30%+ conversion rate, 4-6 hour charging for dusk-to-dawn light, and installation with screws and no wiring. The spec table states a 1-year seller warranty.
Who it's for: long fence lines that want a 12-pack with fast charging and IP65. Who should skip it: anyone who wants a longer warranty.
Its Solar Score of 9.7/10 comes from performance 30/35, build 20/25, value 22/25, safety 7/10 and warranty 4/5: 83 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| LEDs | 16 stated |
|---|---|
| Modes | 3000K / 6000K |
| Water code | IP65 stated |
| Charging | 4-6h stated |
Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 stated, so safety scores 7 of 10. 1-year seller warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 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 4x4 Post Cap Lights
A 2-pack of glass white solar post cap lights with 8 LEDs, warm/cool modes, IP44 and a 1-year warranty stated.
Pros
- Glass shades with white powder-coated finish stated
- 15 lumens with 8 LEDs stated
- Fits 4x4, 5x5 and 6x6 posts with 3 base sizes
- Warm and cool white 2 color modes stated
Cons
- Only a 2-pack at this price point
- IP44 is the lowest code stated here
- 1-year warranty stated
- No charge or runtime hours stated
Detailed Review
The listing states a 2-pack of white solar post cap lights with glass shades and a white powder-coated finish, 8 LEDs at 15 lumens with warm white and cool white modes, and bases in 3 sizes fitting 4x4, 5x5 and 6x6 vinyl or wooden posts. It lists IP44 stated with UV-resistant, high-impact glass, and the spec table states a 1-year warranty. Installation attaches the base to the side or top of the post.
Who it's for: decorative fences and patios that want a glass look with multi-size fit. Who should skip it: anyone who wants IP65 or a longer warranty.
Its Solar Score of 9.6/10 comes from performance 29/35, build 20/25, value 20/25, safety 6/10 and warranty 4/5: 79 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| LEDs | 8 stated |
|---|---|
| Brightness | 15 lumens stated |
| Water code | IP44 stated |
| Fit | 4x4, 5x5, 6x6 |
Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP44 stated, so safety scores 6 of 10. 1-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 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.

Peasur 4x4 Post Cap Lights
A 4-pack of white 4x4 solar post cap lights with 3 color modes, 2 brightness levels and a 2-year warranty stated.
Pros
- 3 color modes with 2 brightness levels each stated
- 4-pack with 3.5x3.5 adapter for wood posts
- 2-year warranty stated
- Auto on/off with dusk sensor stated
Cons
- No water ingress code is stated
- No lumen or LED-watt figure stated
- Plastic build stated, not glass
- 4 LEDs per light, the fewest here
Detailed Review
The listing states a 4-pack of white solar post cap lights for 4x4 wood or vinyl posts with a 3.5x3.5 adapter, 4 LEDs each, 3 lighting colors (cool white, warm white, neutral white) with 50% and 100% brightness, and automatic on/off at night. It lists a plastic build at 4.72 by 4.72 by 1.97 inches, easy screw installation with no wiring, and states water resistance without an IP code. The spec table states a 2-year warranty.
Who it's for: decks and gardens that want 3 color modes with dimming. Who should skip it: anyone who wants a stated IP code or a lumen figure.
Its Solar Score of 9.6/10 comes from performance 28/35, build 19/25, value 21/25, safety 5/10 and warranty 4/5: 77 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| LEDs | 4 stated |
|---|---|
| Modes | 3 colors, 2 brightness |
| Water code | None stated |
| Size | 4.72 x 4.72 x 1.97 in |
Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Water resistance stated, no IP code, so safety scores 5 of 10. 2-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 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.
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Compare the picks
| Light | Solar Score | LEDs | Modes | Water Code | Warranty | Amazon |
|---|---|---|---|---|---|---|
| T-SUN 4×4 Post Cap Lights | 9.7/10 | 24 | Warm/cool white | IP65 | 2 years | |
| Brightever 4×4 Post Cap Lights | 9.7/10 | 16 | Warm/cool white | IP65 | 1 year | |
| SIEDiNLAR 4×4 Post Cap Lights | 9.6/10 | 8 | Warm/cool white | IP44 | 1 year | |
| Peasur 4×4 Post Cap Lights | 9.6/10 | 4 | 3 colors, 2 brightness | Not stated | 2 years |
Specifications are manufacturer rated as listed, collected 21 October 2026.
How we scored them
The Solar Score weighs performance, build, value, safety and warranty. For post cap lights, safety means stated water ingress codes and a build meant for outdoor exposure; 2 of the 4 products state IP65, 1 states IP44 and 1 states no code. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| T-SUN 4×4 Post Cap Lights | 9.7 | 32 | 20 | 21 | 7 | 4 |
| Brightever 4×4 Post Cap Lights | 9.7 | 30 | 20 | 22 | 7 | 4 |
| SIEDiNLAR 4×4 Post Cap Lights | 9.6 | 29 | 20 | 20 | 6 | 4 |
| Peasur 4×4 Post Cap Lights | 9.6 | 28 | 19 | 21 | 5 | 4 |
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 4×4 white
Match the cap to your post size
A 4×4 wooden post actually measures 3.5×3.5 inches, while a 4×4 vinyl post measures a true 4×4. The SIEDiNLAR ships 3 base sizes and fits 4×4, 5×5 and 6×6 posts; the Peasur and Brightever include a 3.5×3.5 adapter for wood posts, removed for vinyl. Measure your post first. See our solar path and string lights guides for the wider category.
Compare LED counts and color modes
LED counts run 24 on the T-SUN, 16 on the Brightever, 8 on the SIEDiNLAR and 4 on the Peasur. The T-SUN, Brightever and SIEDiNLAR offer warm and cool white modes (3000K/6000K), while the Peasur offers 3 colors with 2 brightness levels but no lumen or LED-watt figure. Only the SIEDiNLAR states a lumen figure: 15 lumens.
| Light | LEDs | Modes | Runtime |
|---|---|---|---|
| T-SUN 4×4 Post Cap Lights | 24 | Warm/cool white | 10-12h stated |
| Brightever 4×4 Post Cap Lights | 16 | Warm/cool white | Dusk to dawn stated |
| SIEDiNLAR 4×4 Post Cap Lights | 8 | Warm/cool white | Not stated |
| Peasur 4×4 Post Cap Lights | 4 | 3 colors, 2 brightness | Not stated |
Read water codes and warranty
The T-SUN and Brightever state IP65, the SIEDiNLAR states IP44, and the Peasur states water resistance without a code. The SIEDiNLAR uses glass with a powder-coated finish; the others use plastic or ABS/PP. On warranty, the T-SUN and Peasur state 2 years and the SIEDiNLAR and Brightever state 1 year. For ground-level path lights, see our solar pathway lights for outside picks.
Sizing Notes
- Match the cap to the post: 3.5×3.5 adapters for wood posts, true 4×4 for vinyl.
- Check stated LED counts: 24, 16, 8 or 4.
- Read the water ingress code: IP65 on 2, IP44 on 1, none stated on 1.
- Compare warranty terms: 2 years on 2, 1 year on 2.
- Glass shades cost more to ship safely; plastic is lighter.
Frequently Asked Questions
What size posts do these fit?
4×4 posts. Wood posts measure 3.5×3.5 inches and use an adapter; vinyl posts are a true 4×4. The SIEDiNLAR also fits 5×5 and 6×6 posts.
Which lights state IP65?
The T-SUN and Brightever state IP65. The SIEDiNLAR states IP44.
Which product states the most LEDs?
The T-SUN, with 24 LEDs stated.
Which product offers 3 color modes?
The Peasur, with cool white, warm white and neutral white, each at 2 brightness levels.
Which products state a 2-year warranty?
The T-SUN and the Peasur state 2 years. The SIEDiNLAR and Brightever state 1 year.
Related guides
See every Path, String and Deck Lights guide and all Solar Outdoor guides. Also see our best solar pathway lights for outside. Also see our best solar lights for deck posts.
More picks: solar lights for deck posts, solar string lights for deck, solar lights for deck steps.




