Solar or mains garden lighting — and why water features are different
Solar garden lighting needs 4-5 hours of direct sun a day to charge properly — given that, it lights a path or border with zero cabling and zero running cost, which is genuinely most of the appeal. Mains lighting doesn't care about sun exposure at all, which makes it the answer for a shaded corner, or for anywhere that needs reliable output through a grey British winter when solar panels simply aren't getting the hours.
Water features are worth separating out here rather than folding into the same solar-vs-mains question: every water feature we sell is mains-powered tabletop decor, not something with a solar option in the first place. What follows covers the real choice — lighting — and is honest about why water features aren't part of it.
| Solar | Mains | |
|---|---|---|
| Running cost | None | Electricity cost, however small |
| Installation | No cabling — just position it in sun | Requires outdoor-rated cabling |
| Reliable in winter / shade | No — needs 4-5hrs direct sun | Yes — unaffected by sun exposure |
| Best for | Paths, borders, anywhere sunny | Shaded areas, or year-round reliability |
Rule one. Four to five hours of direct sun is the real requirement
A solar light's output depends entirely on how much genuine direct sun its panel gets, not daylight in general — a spot that's bright but shaded by a tree or a fence gets nowhere near enough charge, however light it looks to the eye. Check the actual sun exposure of the specific spot, at the time of year you want the light working, before assuming any sunny-looking corner of the garden will do.
This is also why solar lighting under-performs in a UK winter specifically — shorter days and lower sun angles cut the usable charging window well below that 4-5 hour target, even in a spot that charges fine all summer.
Rule two. Mains is the only reliable option for a shaded or year-round spot
Anywhere that doesn't get consistent direct sun — under a tree, against a north-facing wall, most gardens through a British winter — mains lighting is the only fuel type that keeps working regardless. The cost is the cabling itself, which needs to be outdoor-rated and, for anything permanent, is worth having installed properly rather than run loose across a lawn.
It's also the practical choice for anywhere brightness actually matters for safety — steps, a driveway, anywhere getting it wrong has a real consequence beyond the light just not looking as good.
Rule three. Water features here are mains, and that's worth knowing upfront
Every water feature in our range — from small tabletop fountains to the larger cascading designs — plugs in rather than running on solar. If you searched expecting a solar water feature, that's not a gap in this guide, it's the honest state of what's on sale: none of our own stock offers it, so there's no genuine solar-vs-mains choice to make here the way there is with lighting.
What mains buys you with a water feature specifically is consistent flow — a solar-powered pump's output would vary with available sunlight through the day, which matters more for a feature you're watching and listening to than it does for a light you're glancing at after dark.
Eight of ours, solar lighting and mains water features side by side
Solar lighting first, then two of our mains water features and a mains string-light example, so the contrast is direct rather than implied.
| Product | Power | Best for |
|---|---|---|
| 1.6m Dimmable Solar Bollard Light | Solar | Path or border, sunny spot |
| 1.8m Victorian Three-Head Solar Lamp Post | Solar | Driveway or entrance, sunny spot |
| Rattan Solar Floor Lantern, Brown | Solar | Patio or decking, sunny spot |
| 1.77m Solar Bollard Lantern | Solar | Path lighting, sunny spot |
| Solar Lamp Post Light with Planter | Solar | Border, sunny spot |
| Garden Water Feature with LED Lights | Mains | Patio or courtyard, any light level |
| Five-Tier Cascading Fountain with LED Lights | Mains | Garden feature, any light level |
| 13.6m Warm White LED String Lights | Mains, plug-in | Patio or pergola, shaded or not |
The short version
Solar needs 4-5 hours of direct sun and gives you zero cabling and zero running cost for paths and borders. Mains works regardless of sun exposure and suits shaded spots and winter reliability. Water features in our range are mains-only — not a gap in this guide, just the honest state of the stock.
Common questions
- How much sun does solar garden lighting need?
- 4-5 hours of direct sun a day, on the panel itself, to charge properly. A spot that looks bright but is shaded by a tree or fence for most of the day won't charge it fully, even if it seems sunny to the eye.
- Does solar garden lighting work in winter?
- Less reliably — shorter days and lower sun angles cut the usable charging window well below the 4-5 hour target, even in a spot that performs well through summer. A shaded or winter-critical spot suits mains lighting better.
- Does Kaiku sell solar water features?
- No — every water feature in our range is mains-powered. If a solar option matters to you specifically, that's worth knowing before browsing this category, since it isn't something we currently stock in any of our fountains or water features.
- Is mains garden lighting worth the cost of installation over solar?
- For a shaded spot or anywhere needing reliable year-round output, generally yes — solar simply can't deliver that regardless of how it's installed. For a sunny path or border, solar usually isn't worth the extra installation cost or cabling.
- Why do water features use mains power instead of solar?
- Mains gives a water feature consistent flow regardless of the time of day or available sunlight, which matters more for something you're watching and listening to continuously than it does for a light glanced at after dark.
The pieces in this guide

1.6m Dimmable Solar Bollard Light, Black
£59

1.8m Victorian Three-Head Solar Lamp Post, Black
£109

Rattan Solar Floor Lantern, Brown
£39

1.77m Solar Bollard Lantern, Black
£45

Solar Lamp Post Light with Planter, Black
£39

Garden Water Feature with LED Lights, Dark Grey
£98

Five-Tier Cascading Fountain with LED Lights, Rustic Brown
£110

13.6m Warm White Decorative LED String Lights
£37