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When visitors arrive after dark, a lit address on the mailbox and lit caps on the fence posts show the way home, and solar mailbox light vs post cap light is the choice between a light that shows an address and a light that marks a post. Pick the mailbox light if the goal is a readable address at night; pick the post cap light if the goal is marking fence, deck or garden posts. We compared mailbox address signs and a post cap light on what each listing states: light modes, runtime, charge time, weather rating, fit and warranty terms.
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Solar mailbox light vs post cap light: side by side
| Solar mailbox light vs post cap light | Etetale Solar Address Sign | IVWVI Solar Mailbox Numbers | Davinci Flexfit Post Cap Light | Amazon |
|---|---|---|---|---|
| Job | Show an address | Show an address | Mark a post | |
| Light modes | 3 colors | 9 modes | Warm white stated | |
| Runtime | 8-12 hours | 10-15 hours | 7-8 hours | |
| Charge time | 5-6 hours in direct sunlight | 7-8 hours in sunlight | Not stated | |
| Weather rating | IP65 | Not stated | IP44 | |
| Warranty | Not stated | Not stated | 90 day | |
| Size | 12.59 x 5.51 inches | 13.2 x 7 inches | 6.3 x 6.3 x 3.5 inches |
Specifications are manufacturer rated as listed, collected 29 October 2026.
Address display
The mailbox side is about reading a number at night. The Etetale example is double-sided, with 3 light colors, cool white 7000K, warm white 2800K and daylight white 4000K, and 8 sets of sticky numbers for a variety of house number combinations. The IVWVI example is also double-sided, with 9 lighting modes, a remote control, and 6 sets of 0-9 adhesive numbers that can be posted on both sides. Both mailbox examples turn on automatically at dusk, and both are made to sit on top of a mailbox, with the Etetale example also offered for a pillar and for no-drilling fitting with cable zip ties.
Post marking
The post cap side is about marking the top of a post, not showing a number. The Davinci example fits round or square 4×4 wooden posts at 3.5×3.5 inches, 5×5 wooden posts at 4.5×4.5 inches, and 6×6 wooden posts at 5.5×5.5 inches, with different bases included. It states 25 lumens of warm white light at 3000 Kelvin, cordless and self-contained fitting, automatic turn-on at night, and 7-8 hours of battery life each night, for fence, deck, garden or patio posts.
What the listings leave unclear
The Davinci listing disagrees with itself in three places, and this guide follows the title and bullets in each case. The title and bullets state 25 lumens, while the spec table lists Brightness as 15 Lumens. The bullets state 7-8 hours of battery life, while the spec table lists Battery Life as 6-8 Hours. The title states 1PK and the spec table lists Size as 1 Pack, while the same spec table lists Quantity as 4 Pack. On the mailbox side, the IVWVI listing states a design for rain, snow, frost and sleet but gives no IP rating figure, and neither mailbox listing states a warranty term or, in the Etetale case, a battery capacity figure in mAh.
Three examples
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 |  Etetale Solar Address Sign | 9.6/10 | Buy on Amazon |
| 2 |  IVWVI Solar Mailbox Numbers | 9.6/10 | Buy on Amazon |
| 3 |  Davinci Flexfit Post Cap Light | 9.5/10 | Buy on Amazon |
Etetale Solar Address Sign
A double-sided solar address sign with 3 light colors, 8 sets of numbers and an IP65 rating for mailbox tops and pillars.
Pros
- Double-sided illuminated design, visible from any angle
- 3 light colors: cool white 7000K, warm white 2800K and daylight white 4000K
- Lights for 8-12 hours after 5-6 hours of direct sunlight, turning on automatically at dusk
- IP65 rating stated, with an engineering-grade vinyl number set
Cons
- Mailbox not included, as stated in the listing
- No warranty term is stated
- Battery capacity in mAh is not stated
- Size is stated as 12.59 x 5.51 inches, with no depth figure stated
Detailed Review
The listing states a double-sided solar address sign with 3 light colors, cool white 7000K, warm white 2800K and daylight white 4000K, 8 sets of sticky numbers, an IP65 rating, a photosensitive sensor that turns the light on automatically at dusk, lighting for 8-12 hours after 5-6 hours of direct sunlight, engineering-grade vinyl numbers, and fitting by screws after drilling or by cable zip ties with no drilling. It is stated at 12.59 x 5.51 inches and 0.58 kg, and the listing states that the mailbox is not included.
Who it's for: homeowners who want visitors, mail carriers and emergency services to read the address at night. Who should skip it: buyers who want a stated battery capacity figure in mAh, or a warranty term before buying.
Its Solar Score of 9.6/10 comes from performance 30/35, build 21/25, value 21/25, safety 8/10 and warranty 0/5: 80 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Light colors | 7000K, 2800K, 4000K |
|---|---|
| Runtime | 8-12 hours |
| Charge | 5-6 hours in direct sunlight |
| Rating | IP65 |
Figures as published on the retailer listing, collected 29 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 rating 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.
IVWVI Solar Mailbox Numbers
A double-sided solar mailbox number sign with 9 lighting modes, a remote control and a 2200mAh battery for mailbox tops.
Pros
- 9 lighting modes with a remote control, including 7 color auto changing and Flash mode
- Lights for 10-15 hours after 7-8 hours of full charge in sunlight
- 6 sets of 0-9 adhesive numbers for double-sided display
- Turns on automatically at dusk and off at dawn, with a polysilicon solar panel
Cons
- No IP rating is stated, only a design stated for rain, snow, frost and sleet
- No warranty term is stated
- No depth figure is stated, only 13.2 x 7 inches
- Remote control range is not stated
Detailed Review
The listing states a double-sided solar mailbox number sign with 6 sets of 0-9 adhesive numbers, 9 lighting modes with a remote control, a polysilicon solar panel, a 2200mAh rechargeable battery, lighting for 10-15 hours after 7-8 hours of full charge in sunlight, automatic turn-on at dusk and turn-off at dawn, fitting with screws and silicone gaskets, and a design for rain, snow, frost and sleet. It is stated at 13.2 x 7 inches and 1.4 pounds, with an ABS and PMMA construction.
Who it's for: homeowners who want color choice and remote control on a lit address sign. Who should skip it: buyers who want a stated IP rating figure, or a warranty term before buying.
Its Solar Score of 9.6/10 comes from performance 29/35, build 21/25, value 21/25, safety 4/10 and warranty 0/5: 75 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Modes | 9 modes with remote |
|---|---|
| Battery | 2200mAh |
| Runtime | 10-15 hours |
| Size | 13.2 x 7 inches |
Figures as published on the retailer listing, collected 29 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Design stated for rain, snow, frost and sleet, so safety scores 4 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.
Davinci Flexfit Post Cap Light
A solar post cap light that fits 4x4, 5x5 and 6x6 wooden posts, with warm white light and an IP44 rating for fences, decks and gardens.
Pros
- Fits 4x4, 5x5 and 6x6 wooden posts, with bases for round or square posts
- 25 lumens of warm white light stated in the title and bullets, with a 3000 Kelvin color temperature
- Cordless and self-contained, turning on automatically at night, with 7-8 hours of battery life
- UV fade-protected plastic with a NiMH battery stated
Cons
- Spec table brightness of 15 Lumens does not agree with the 25 lumens in the title and bullets
- Spec table battery life of 6-8 Hours does not agree with the 7-8 hours in the bullets
- Spec table Quantity of 4 Pack does not agree with the 1 Pack size and title
- Warranty term is only 90 days, as stated
Detailed Review
The listing states a solar post cap light fitting 4x4 wooden posts at 3.5x3.5 inches, 5x5 wooden posts at 4.5x4.5 inches, and 6x6 wooden posts at 5.5x5.5 inches, with 25 lumens of warm white light at 3000 Kelvin, cordless and self-contained fitting, automatic turn-on at night, 7-8 hours of battery life, UV fade-protected plastic, a NiMH battery, an IP44 rating, screw-on installation, a size of 6.3 x 6.3 x 3.5 inches, a weight of 260 g, and a 90 day warranty. The spec table lists Brightness as 15 Lumens, Battery Life as 6-8 Hours, and Quantity as 4 Pack, which do not agree with the title and bullets, so this guide follows the title and bullets on brightness, battery life and pack size.
Who it's for: fence, deck, garden or patio owners who want cordless cap lights across post sizes. Who should skip it: buyers who want an address display, or a longer stated warranty term.
Its Solar Score of 9.5/10 comes from performance 26/35, build 20/25, value 19/25, safety 5/10 and warranty 1/5: 71 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Fit | 4x4, 5x5, 6x6 wooden posts |
|---|---|
| Brightness | 25 lumens, warm white |
| Runtime | 7-8 hours |
| Rating | IP44 |
Figures as published on the retailer listing, collected 29 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP44 rating stated, so safety scores 5 of 10. 90 day 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.
As an Amazon Associate I earn from qualifying purchases.
How we scored them
The Solar Score weighs performance, build, value, safety and warranty. For outdoor lights, safety means an IP rating or another weather feature the listing actually states: the Etetale example states IP65, the Davinci example states IP44, and the IVWVI example states no IP rating, so its safety line rests on the stated design for rain, snow, frost and sleet. Only the Davinci example states a warranty term, at 90 days. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Etetale Solar Address Sign | 9.6 | 30 | 21 | 21 | 8 | 0 |
| IVWVI Solar Mailbox Numbers | 9.6 | 29 | 21 | 21 | 4 | 0 |
| Davinci Flexfit Post Cap Light | 9.5 | 26 | 20 | 19 | 5 | 1 |
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.
Solar mailbox light vs post cap light: which should you choose?
Choose a mailbox light if visitors, mail carriers or emergency services need to read the address at night, and choose the post cap light if the job is marking posts along a fence, deck or garden. Within the mailbox side, the Etetale example gives 3 set colors and an IP65 rating, while the IVWVI example gives 9 modes with a remote and a longer stated runtime. The Davinci example is the only pick here that fits posts, and the only pick here that states a warranty term.
| If you need | Look at |
|---|---|
| A readable address at night | Etetale Solar Address Sign or IVWVI Solar Mailbox Numbers, both double-sided |
| The most light modes | IVWVI Solar Mailbox Numbers, with 9 modes and a remote control |
| The longest stated runtime | IVWVI Solar Mailbox Numbers, with 10-15 hours stated |
| Fit across post sizes | Davinci Flexfit Post Cap Light, fitting 4×4, 5×5 and 6×6 wooden posts |
| A stated warranty term | Davinci Flexfit Post Cap Light, with a 90 day warranty stated |
Sizing Notes
- Match the sign to the mailbox: the Etetale example is stated at 12.59 x 5.51 inches, and the IVWVI example at 13.2 x 7 inches, both double-sided.
- Match the cap to the post: the Davinci example fits 4×4 posts at 3.5×3.5 inches, 5×5 posts at 4.5×4.5 inches, and 6×6 posts at 5.5×5.5 inches.
- Match runtime to the night: the Etetale example states 8-12 hours, the IVWVI example states 10-15 hours, and the Davinci example states 7-8 hours.
- Match the warranty line to the risk: only the Davinci example states a term, at 90 days, and the mailbox examples state no warranty term.
Frequently Asked Questions
Which side shows a house number?
The mailbox side. Both mailbox examples are double-sided, with the Etetale example offering 8 sets of numbers and the IVWVI example offering 6 sets of 0-9 adhesive numbers.
Which pick has the most light modes?
The IVWVI example, with 9 lighting modes and a remote control, including 7 color auto changing and Flash mode. The Etetale example offers 3 light colors.
How long do the mailbox signs light after charging?
The Etetale example lights for 8-12 hours after 5-6 hours of direct sunlight, and the IVWVI example lights for 10-15 hours after 7-8 hours of full charge in sunlight.
Does the post cap light fit different post sizes?
The Davinci example states fit for 4×4 wooden posts at 3.5×3.5 inches, 5×5 wooden posts at 4.5×4.5 inches, and 6×6 wooden posts at 5.5×5.5 inches, with different bases included.
Which pick states a warranty?
Only the Davinci example, at 90 days. Neither mailbox example states a warranty term.
Related guides
See every Solar Lights, Cameras and Fans guide. Also see our best solar mailbox light under 10 and best solar post cap lights under 15.
