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A patio that needs a single strand over the table and a backyard fence that needs a full run ask for different lengths, and that is where solar string lights 25ft vs 50ft stops being a filter and starts being a real choice. This comparison looks at options from both sides, shorter and longer strings, using each listing only for what it publishes. The short verdict: the 50ft side suits larger spaces, with the Larkvue here stating the longest total length and a memory function; the 25ft side suits small patios and balconies, where remotes, timers and dual charging matter more.
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Solar string lights 25ft vs 50ft: side by side
| 25FT vs 50FT | Larkvue 50FT G40 String Lights | FUANXIEI 50FT ST38 String Lights | addlon 25FT G40 String Lights | YLXS 25FT S11 String Lights | Amazon |
|---|---|---|---|---|---|
| Length stated | 50 feet, 2x25FT | 50 feet | 25 feet | 25 feet | |
| Bulbs stated | 20 G40 + 2 spare | 16 ST38, 2700K | 12 G40 + 1 spare | 10 S11 + 1 spare, 2700K | |
| Run time stated | Up to 8 hours | Up to 20+ hours | 15-20 hours | Up to 8 hours | |
| Charging | Solar + USB | Solar + USB | Solar + USB | Solar + USB | |
| Weather code stated | IP65 | IP65 | Not stated | IP65 | |
| Warranty stated | Not stated | 1 year warranty | 3 year product support | Not stated |
Specifications are manufacturer rated as listed, collected 22 October 2026.
What each side states
The 25ft side pairs the addlon and YLXS strings. The addlon states a 25-foot string with 12 G40 bulbs plus 1 spare, a remote with 4 brightness levels and 3 modes, solar and USB charging, a 2200mAh battery with 15 to 20 hours of use, and a 3 year product support. The YLXS states a 25-foot string with S11 bulbs at 2700K, 10 bulbs plus 1 spare, IP65, a remote with 3 modes and 4 timer settings, 0 to 100% dimming, solar charging in 6 to 8 hours for up to 8 hours a night, and USB charging. The 50ft side pairs the Larkvue and FUANXIEI strings. The Larkvue states 50 feet as 2x25FT with 20 G40 bulbs plus 2 spares at 2700K, IP65, a remote with 3 modes, 4 timers and a memory function, solar charging in 6 to 8 hours for up to 8 hours, and USB charging. The FUANXIEI states a 50-foot string with 16 ST38 bulbs at 2700K, IP65, a remote with 4 brightness levels and 3 modes, solar and USB charging with about 4 hours on USB, up to 20+ hours of illumination, dusk-to-dawn auto off after 7 hours, and a 1 year warranty. Neither side wins on a spec the other side leaves out: the addlon states no IP code, and the YLXS states no battery capacity.
Length, bulbs and run time
Length is the stated split: 25 feet for the addlon and YLXS, 50 feet for the Larkvue as 2x25FT and the FUANXIEI as one string. Bulb counts follow: 12 plus 1 spare for the addlon, 10 plus 1 for the YLXS, 20 plus 2 spares for the Larkvue, and 16 for the FUANXIEI. Run times: the addlon states 15 to 20 hours, the FUANXIEI up to 20+ hours, and the YLXS and Larkvue up to 8 hours a night. All four state solar plus USB charging.
What the listings leave unclear
The addlon title says 13LED while the bullets describe 12 bulbs plus 1 spare; the two agree at 13 total. The FUANXIEI title says 16 ST38 bulbs while the spec table says 15 light sources; the title wins. The YLXS states no battery capacity figure, so its 8-hour night figure has no stated basis. The addlon states no IP code, only a general weather claim.
Four examples
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 |  FUANXIEI 50FT ST38 String Lights | 9.6/10 | Buy on Amazon |
| 2 |  Larkvue 50FT G40 String Lights | 9.6/10 | Buy on Amazon |
| 3 |  addlon 25FT G40 String Lights | 9.5/10 | Buy on Amazon |
| 4 |  YLXS 25FT S11 String Lights | 9.5/10 | Buy on Amazon |
FUANXIEI 50FT ST38 String Lights
A 50-foot string with 16 ST38 bulbs at 2700K, IP65, a remote and up to 20+ hours of illumination.
Pros
- Up to 20+ hours of illumination stated
- 16 ST38 bulbs at 2700K stated
- IP65 stated
- 1 year warranty stated
Cons
- Title says 16 bulbs while the spec table says 15 light sources
- Dusk-to-dawn auto off after 7 hours limits the 20+ hour claim
- No per-bulb spacing figure is stated
- 1W per bulb with no total wattage stated
Detailed Review
The listing states a 50-foot string with 16 ST38 bulbs at 2700K, IP65, a remote with 4 brightness levels and 3 modes, solar and USB charging with about 4 hours on USB, up to 20+ hours of illumination, dusk-to-dawn auto off after 7 hours, and a 1 year warranty. The title says 16 ST38 bulbs while the spec table says 15 light sources; the title wins.
Who it's for: anyone who wants the longest stated run time here with a warranty term. Who should skip it: anyone who wants dusk-to-dawn without the 7-hour auto off.
Its Solar Score of 9.6/10 comes from performance 28/35, build 20/25, value 21/25, safety 7/10 and warranty 1/5: 77 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Length | 50 feet |
|---|---|
| Bulbs | 16 ST38, 2700K, 1W each |
| Run time | Up to 20+ hours |
| Warranty | 1 year warranty |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 stated, so safety scores 7 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.
Larkvue 50FT G40 String Lights
A 50-foot string as 2x25FT with 20 G40 bulbs plus 2 spares, IP65, a remote and a memory function.
Pros
- 50 feet as 2x25FT, the longest total length here
- 20 G40 bulbs plus 2 spares at 2700K stated
- IP65 stated
- Memory function resumes the last setting stated
Cons
- No warranty term is stated
- No battery capacity figure is stated
- 1.18 kg with no per-string breakdown
- Up to 8 hours is the briefest run time here
Detailed Review
The listing states a 50-foot string as 2x25FT with 20 G40 bulbs plus 2 spares at 2700K, IP65, a remote with 3 modes, 4 timers and a memory function, 0 to 100% dimming, solar charging in 6 to 8 hours for up to 8 hours, and USB charging, at 1.18 kg. No warranty term or battery capacity figure is stated.
Who it's for: anyone lighting a long run who wants the longest total length with a memory function. Who should skip it: anyone who wants a stated warranty term.
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
| Length | 50 feet, 2x25FT |
|---|---|
| Bulbs | 20 G40 + 2 spare, 2700K |
| Charging | Solar 6-8 hours, USB |
| Weather | IP65 |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 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.
addlon 25FT G40 String Lights
A 25-foot string with 12 G40 bulbs plus 1 spare, a remote, solar and USB charging and 3 year product support.
Pros
- 25-foot string with 12 G40 bulbs plus 1 spare stated
- 2200mAh battery with 15 to 20 hours of use stated
- Remote with 4 brightness levels and 3 modes stated
- 3 year product support stated, the longest term here
Cons
- No IP code is stated
- No bulb spacing figure is stated
- 5.5 volts with no panel wattage stated
- 1 watt with no per-bulb breakdown stated
Detailed Review
The listing states a 25-foot string with 12 G40 bulbs plus 1 spare, a remote with 4 brightness levels and 3 modes, solar and USB charging, a 2200mAh battery with 15 to 20 hours of use, and a 3 year product support. The title says 13LED while the bullets describe 12 bulbs plus 1 spare; the two agree at 13 total. No IP code is stated.
Who it's for: anyone who wants a stated battery capacity with the longest stated run time on the 25ft side. Who should skip it: anyone who wants a stated IP code.
Its Solar Score of 9.5/10 comes from performance 28/35, build 20/25, value 21/25, safety 4/10 and warranty 2/5: 75 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Length | 25 feet |
|---|---|
| Bulbs | 12 G40 + 1 spare |
| Battery | 2200mAh, 15-20 hours |
| Warranty | 3 year product support |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Shatterproof bulbs stated, so safety scores 4 of 10. 3 year product support 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.
YLXS 25FT S11 String Lights
A 25-foot string with S11 bulbs at 2700K, IP65, a remote with timers and solar plus USB charging.
Pros
- 25-foot string with S11 bulbs at 2700K stated
- IP65 stated
- Remote with 3 modes and 4 timer settings stated
- Solar charging in 6 to 8 hours with USB backup stated
Cons
- No warranty term is stated
- No battery capacity figure is stated
- 10 bulbs is the lowest count here
- Up to 8 hours is the briefest run time here
Detailed Review
The listing states a 25-foot string with S11 bulbs at 2700K, 10 bulbs plus 1 spare, IP65, a remote with 3 modes and 4 timer settings, 0 to 100% dimming, solar charging in 6 to 8 hours for up to 8 hours a night, and USB charging, at 1.32 pounds. No warranty term or battery capacity figure is stated.
Who it's for: anyone who wants IP65 with timer settings on the 25ft side. Who should skip it: anyone who wants a stated warranty term.
Its Solar Score of 9.5/10 comes from performance 27/35, build 20/25, value 21/25, safety 7/10 and warranty 0/5: 75 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Length | 25 feet |
|---|---|
| Bulbs | 10 S11 + 1 spare, 2700K |
| Charging | Solar 6-8 hours, USB |
| Weather | IP65 |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 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.
As an Amazon Associate I earn from qualifying purchases.
Where the points went
The Solar Score weighs performance, build, value, safety and warranty. For string lights, safety means a stated weather code or shatterproof construction; three listings state IP65 and the addlon states shatterproof bulbs. Two listings state a warranty term, 3 year product support and 1 year; the other two state no term, so they earn no warranty points. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| FUANXIEI 50FT ST38 String Lights | 9.6 | 28 | 20 | 21 | 7 | 1 |
| Larkvue 50FT G40 String Lights | 9.6 | 29 | 21 | 21 | 7 | 0 |
| addlon 25FT G40 String Lights | 9.5 | 28 | 20 | 21 | 4 | 2 |
| YLXS 25FT S11 String Lights | 9.5 | 27 | 20 | 21 | 7 | 0 |
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 string lights 25ft vs 50ft: which should you choose?
Choose the 50ft side for larger spaces. The Larkvue states 50 feet as 2x25FT with a memory function and IP65, and the FUANXIEI states up to 20+ hours with a 1 year warranty; see our best solar string lights for backyard roundup for similar strings. Choose the 25ft side for small patios and balconies: the addlon gives a 2200mAh battery with 15 to 20 hours and 3 year product support, and the YLXS gives IP65 with 4 timer settings. For patio-specific picks, our best solar string lights for patio guide covers more.
| If you need | Look at |
|---|---|
| Longest total length | Larkvue 50FT G40 String Lights, 50 feet as 2x25FT |
| Memory function | Larkvue 50FT G40 String Lights, resumes last setting |
| Longest run time | FUANXIEI 50FT ST38 String Lights, up to 20+ hours |
| Battery capacity stated | addlon 25FT G40 String Lights, 2200mAh |
| IP65 on the 25ft side | YLXS 25FT S11 String Lights, IP65 |
Sizing Notes
- Match the length to the space: 25 feet for the addlon and YLXS, and 50 feet for the Larkvue and FUANXIEI.
- Check the bulb count: 12 plus 1 spare for the addlon, 10 plus 1 for the YLXS, 20 plus 2 spares for the Larkvue, and 16 for the FUANXIEI.
- Check the run time: 15 to 20 hours for the addlon, up to 20+ hours for the FUANXIEI, and up to 8 hours for the YLXS and Larkvue.
- Check the warranty: 3 year product support for the addlon and 1 year for the FUANXIEI; the YLXS and Larkvue state none.
FAQ: power away from the grid
Which string is the longest?
The Larkvue and FUANXIEI at 50 feet; the Larkvue comes as 2x25FT. The addlon and YLXS are 25 feet.
Which listings state a warranty?
The addlon states 3 year product support and the FUANXIEI a 1 year warranty. The YLXS and Larkvue state no warranty term.
Do all four charge by USB as well as solar?
Yes. All four state solar plus USB charging; the FUANXIEI states about 4 hours for a full USB charge.
Which listings state IP65?
The YLXS, Larkvue and FUANXIEI. The addlon states no IP code.
Related solar guides
See every Path, String and Deck Lights guide and all Solar Lights, Cameras and Fans guides.
More picks: best solar string lights for gazebo, best solar string lights for wedding, best solar string lights for fence.
