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At dusk along a deck rail or fence line, the posts themselves can carry the light, and the choice in 3×3 vs 4×4 solar post cap lights comes down to the size of the posts already standing in the yard. Pick the smaller side for posts that measure for the smaller cap, and the larger side for the larger cap: a cap that does not fit will not sit right, however pleasant its glow looks. This comparison puts two Egadis lights for the smaller posts against two Peasur lights for the larger posts, looking at fit, light modes, stated runtime and weather ratings.
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3×3 vs 4×4 solar post cap lights: side by side
| Post cap light | Egadis 3×3 12 Pack | Peasur 4×4 3 Mode 4 Pack | Peasur 4×4 10 Pack | Egadis 3×3 4 Pack | Amazon |
|---|---|---|---|---|---|
| Solar Score | 75 | 72 | 70 | 69 | |
| Side | 3×3 | 4×4 | 4×4 | 3×3 | |
| Fit | 3 by 3 inch posts | 4 by 4 posts, 3.5 by 3.5 inch adapter | 4 by 4 posts, 3.5 by 3.5 inch adapter | 3 by 3 inch posts | |
| Light modes | 3000K or 6000K | 3 modes, 2 brightness levels | Cool white or warm white | 3000K or 6000K | |
| Runtime stated | 8-12 hours | Not stated | Up to 10 hours | Not stated | |
| Weather rating | IP65 | Not stated | IP64 | IP65 | |
| Pack size | 12 | 4 | 10 | 4 | |
| Warranty | 1-year warranty | 2 years | Not stated | Not stated |
These specs are rated by the maker and quoted from each listing on 4 November 2026.
Fit comes first
Fit settles the choice before any other feature matters. The two Egadis lights are made for standard 3 by 3 inch posts, the 12 pack adding a base adapter for compatible 3 by 3 inch square posts. The two Peasur lights are made for standard 4 by 4 wood or vinyl posts, both with an adapter for a 3.5 by 3.5 inch post size. The right side is simply the one that matches the posts in place.
Light modes and runtime
On light modes, the larger side offers the wider choice. Both Egadis lights offer two light colors, warm white at 3000K and cool white at 6000K, switched from the cap. The Peasur 10 pack also offers two color modes, cool white and warm white. The Peasur 4 pack goes further: 3 modes covering cool white, warm white and neutral white, each at two brightness levels. Only two listings state a runtime figure: the Egadis 12 pack 8-12 hours after a full day of direct sunlight, the Peasur 10 pack up to 10 hours after 6-8 hours of charging. The other two state no runtime figure.
Weather ratings and build
Three listings state a weather rating; the fourth states weather resistance without a code. Both Egadis lights state IP65, with ABS housing stated. The Peasur 10 pack states IP64, with high-strength, weather-resistant materials stated. The Peasur 4 pack states no IP rating, but describes outdoor use in rain, snow and sun.
What the listings leave unclear
Several figures are missing: the Egadis 4 pack states no runtime and no warranty term, the Peasur 4 pack no runtime and no IP rating, and the Peasur 10 pack no warranty term, its fit claim resting on the 3.5 by 3.5 inch adapter size. Only the Egadis 12 pack states both a runtime range and a warranty term, a 1-year warranty; the Peasur 4 pack states the longest term here at 2 years.
Four examples
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 |  Egadis 3x3 12 Pack | 9.7/10 | Buy on Amazon |
| 2 |  Peasur 4x4 3 Mode 4 Pack | 9.6/10 | Buy on Amazon |
| 3 |  Peasur 4x4 10 Pack | 9.6/10 | Buy on Amazon |
| 4 |  Egadis 3x3 4 Pack | 9.6/10 | Buy on Amazon |
Egadis 3x3 12 Pack
A 12 pack for 3 by 3 inch posts, with 3000K warm white and 6000K cool white modes, IP65 rating, 8-12 hours of stated glow.
Pros
- 8-12 hours of glow after a full day of direct sunlight
- Two light colors stated: 3000K warm white and 6000K cool white
- IP65 rating stated, ABS housing
- 12 pack, base adapter for compatible 3 by 3 inch square posts
Cons
- Decorative accent lighting rather than primary area illumination, per the listing
- Runtime may vary with sunlight, season and weather, per the listing
- 1-year warranty, shorter than the 2 years stated for the Peasur 4 pack
- Listed dimensions of 3.35 by 3.35 by 2.5 inches differ from the 3 by 3 inch post size
Detailed Review
The listing states a 12 pack for 3 by 3 inch posts, with automatic on at dusk and off at dawn, two light colors, 3000K warm white and 6000K cool white, ABS housing with an IP65 rating, and 8-12 hours of glow after a full day of direct sunlight. It includes a base adapter for compatible 3 by 3 inch square posts, listed dimensions 3.35 by 3.35 by 2.5 inches, and decorative accent lighting rather than primary area illumination.
Who it's for: owners with 3 by 3 inch posts lighting a long fence line or deck rail in one pack. Who should skip it: larger posts, or a third light color.
Its Solar Score of 9.7/10 comes from performance 30/35, build 21/25, value 21/25, safety 8/10 and warranty 1/5: 81 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Fit | 3 by 3 inch posts, adapter included |
|---|---|
| Light colors | 3000K warm white and 6000K cool white |
| Runtime | 8-12 hours after a full day of direct sunlight |
| Rating | IP65 |
Figures as published on the retailer listing, collected 4 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 rating and ABS housing stated, so safety scores 8 of 10. 1-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 1 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 3 Mode 4 Pack
A 4 pack for 4 by 4 posts, with 3 light modes at two brightness levels, 3.5 by 3.5 inch adapter, 2 years warranty.
Pros
- Three light modes stated: cool white, warm white and neutral white
- Two brightness levels stated per color
- 3.5 by 3.5 inch adapter included for wooden post sizes
- 2 years warranty stated, the longest term in this group
Cons
- No IP rating code is stated
- No runtime figure is stated
- Only a 4 pack; a long fence line needs more than one pack
- Listed weight of 1.0 pounds describes one light, not the full pack
Detailed Review
The listing states a 4 pack for standard 4 by 4 wood and vinyl posts, with a dedicated 3.5 by 3.5 inch adapter, 3 modes covering cool white, warm white and neutral white, and two brightness levels for each color. It states solar charging by day, automatic on at night, weather-resistant outdoor use in rain and snow, and simple mounting by nailing the base on and screwing the light in place. The listing gives no IP rating code and no runtime figure.
Who it's for: owners with 4 by 4 posts wanting three light colors, a dimmer setting, and the longest stated warranty here. Who should skip it: a stated IP rating or runtime figure.
Its Solar Score of 9.6/10 comes from performance 30/35, build 21/25, value 20/25, safety 5/10 and warranty 2/5: 78 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Fit | 4 by 4 posts, 3.5 by 3.5 inch adapter |
|---|---|
| Light modes | Cool white, warm white and neutral white |
| Brightness | Two brightness levels per color |
| Weight | 1.0 pounds stated |
Figures as published on the retailer listing, collected 4 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Weather-resistant outdoor design stated for rain and snow, no IP rating, so safety scores 5 of 10. 2 years warranty stated. 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.
Peasur 4x4 10 Pack
A 10 pack for 4 by 4 posts, with cool white and warm white modes, 16 LED beads, 20 lumens, up to 10 hours of stated illumination.
Pros
- Up to 10 hours of nighttime illumination after 6-8 hours of direct sunlight charging
- 16 LED beads and 20 lumens stated
- IP64 rating stated, weather-resistant materials
- 10 pack, screw fittings and a mounting base stated
Cons
- No warranty term is stated
- Only two color modes, no neutral white mode stated
- IP64 rating, lower than the IP65 rating stated for the Egadis pair
- Listed cap dimensions of 4.2 by 4.2 by 2.2 inches differ from the 3.5 by 3.5 inch adapter size
Detailed Review
The listing states a 10 pack for standard 4 by 4 wooden and vinyl posts, with an actual fit of 3.5 by 3.5 inches, two color modes covering cool white and warm white, 16 LED beads, 20 lumens, a high-efficiency monocrystalline silicon solar panel, and an IP64 rating. It states full charging in 6-8 hours of direct sunlight and up to 10 hours of nighttime illumination, with automatic on at dusk and off at dawn. The cap dimensions are 4.2 by 4.2 by 2.2 inches, while the fit claim rests on the 3.5 by 3.5 inch size: match the adapter size to the post.
Who it's for: owners with 4 by 4 posts wanting a 10 pack, a stated runtime and lumen figure. Who should skip it: a stated warranty term or third light color.
Its Solar Score of 9.6/10 comes from performance 29/35, build 21/25, value 21/25, safety 7/10 and warranty 0/5: 78 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Fit | 4 by 4 posts, actual fit 3.5 by 3.5 inches |
|---|---|
| Light | 16 LED beads, 20 lumens stated |
| Runtime | Up to 10 hours after 6-8 hours of direct sunlight charging |
| Rating | IP64 |
Figures as published on the retailer listing, collected 4 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP64 rating and weather-resistant materials stated, so safety scores 7 of 10. No warranty term, so warranty scores zero. 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.
Egadis 3x3 4 Pack
A 4 pack for 3 by 3 inch posts, with 3000K warm white and 6000K cool white modes, IP65 rating, automatic night lighting.
Pros
- Two light colors stated: 3000K warm white and 6000K cool white
- IP65 rating stated, ABS material
- Automatic night lighting with no wiring stated
- Made for standard 3 by 3 inch fence and deck posts
Cons
- No runtime figure is stated
- No warranty term is stated
- Only a 4 pack; a long run of posts needs more than one pack
- Buyer must measure the post before ordering, per the listing
Detailed Review
The listing states a 4 pack for standard 3 by 3 inch fence and deck posts, compatible with vinyl, wood and metal posts, with two light colors, 3000K warm white and 6000K cool white, ABS material with an IP65 rating, and automatic lighting that charges by day and turns on after dark. It states no wiring and no added electricity costs, with a switch for cool white or warm white.
Who it's for: owners with 3 by 3 inch posts wanting a small pack with two light colors and an IP65 rating. Who should skip it: a stated runtime or warranty term.
Its Solar Score of 9.6/10 comes from performance 28/35, build 21/25, value 20/25, safety 8/10 and warranty 0/5: 77 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Fit | Standard 3 by 3 inch posts |
|---|---|
| Light colors | 3000K warm white and 6000K cool white |
| Rating | IP65 |
| Material | ABS stated |
Figures as published on the retailer listing, collected 4 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 rating and ABS material stated, so safety scores 8 of 10. No warranty term, so warranty scores zero. 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.
Where the points went
The Solar Score weighs performance, build, value, safety and warranty. For these lights, safety means a stated weather rating or stated outdoor protection feature: the two IP65 lights score on that line, the IP64 light slightly lower, and the Peasur 4 pack on its weather-resistant outdoor design without a code. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Egadis 3×3 12 Pack | 9.7 | 30 | 21 | 21 | 8 | 1 |
| Peasur 4×4 3 Mode 4 Pack | 9.6 | 30 | 21 | 20 | 5 | 2 |
| Peasur 4×4 10 Pack | 9.6 | 29 | 21 | 21 | 7 | 0 |
| Egadis 3×3 4 Pack | 9.6 | 28 | 21 | 20 | 8 | 0 |
Every total is translated into a figure between 9.2 and 9.8 with a linear formula; ranking by points and ranking by score always agree.
How to choose the best 3×3 vs 4×4 solar post cap lights
Measure the post before anything else
Measure the actual post, not the lumber label: a post sold as 4 by 4 measures 3.5 by 3.5 inches, the adapter size both Peasur listings state. For the smaller cap, the Egadis pair matches. A cap bought for the wrong post size will not sit as described.
Pick the light color range you will actually use
Both sides offer warm white and cool white, so the decision is about range. The Egadis lights switch between 3000K warm white and 6000K cool white; the Peasur 10 pack between cool white and warm white. Only the Peasur 4 pack adds neutral white, with two brightness levels per color. For fence lines, see the best solar lights for fence line guide; for seating areas, the best solar lights for garden bench guide.
Weigh pack size against stated runtime and warranty
Pack size differs plainly: 12, 10, or 4, as each listing states. A larger pack suits a long fence line or full deck rail; a 4 pack suits a short run of posts or a porch and mailbox set, a use the Peasur 4 pack listing names. Against that: the Egadis 12 pack states 8-12 hours and a 1-year warranty, the Peasur 10 pack up to 10 hours, no warranty term stated, and the Peasur 4 pack a 2 years warranty, no runtime stated.
| If you need | Look at |
|---|---|
| A cap for smaller posts | Egadis 3×3 12 Pack or Egadis 3×3 4 Pack |
| A cap for larger posts | Peasur 4×4 3 Mode 4 Pack or Peasur 4×4 10 Pack |
| Three light colors | Peasur 4×4 3 Mode 4 Pack |
| Longest stated warranty | Peasur 4×4 3 Mode 4 Pack, 2 years |
Sizing Notes
- Cap to measured post: 3 by 3 inch for the Egadis pair, 4 by 4 with a 3.5 by 3.5 inch adapter for Peasur.
- Light color: 3000K warm white or 6000K cool white on the Egadis pair, plus neutral white on the Peasur 4 pack.
- Pack size to the run: 12, 10 or 4, as each listing states.
- Stated runtime: 8-12 hours (Egadis 12 pack), up to 10 hours (Peasur 10 pack), none stated for the other two.
- Warranty terms: 1-year (Egadis 12 pack), 2 years (Peasur 4 pack), none stated for the other two.
FAQ: power away from the grid
Can a 3×3 cap light fit a 4×4 post?
No, not as these listings describe them: Egadis lights fit standard 3 by 3 inch posts, Peasur lights standard 4 by 4 posts with a 3.5 by 3.5 inch adapter, so measure the post and pick the matching side.
Which lights here offer both warm white and cool white?
All four offer warm white and cool white: the Egadis pair 3000K warm white and 6000K cool white, the Peasur 10 pack cool white and warm white modes, and the Peasur 4 pack neutral white.
How long do these lights run at night, as stated?
The Egadis 12 pack states 8-12 hours after a full day of direct sunlight; the Peasur 10 pack up to 10 hours after 6-8 hours of charging. The other two state no runtime figure.
Which lights here state a weather rating?
Both Egadis lights state IP65, the Peasur 10 pack IP64; the Peasur 4 pack states weather-resistant outdoor use but no IP code.
Which light here has the longest stated warranty?
The Peasur 4 pack, at 2 years; the Egadis 12 pack states 1-year, the other two no warranty term.
Related solar guides
See every Path, String and Deck Lights guide and all Solar Lights, Cameras and Fans guides.
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