1 / 7Joomer 20 m 200-LED Warm White Christmas Lights
Joomer Christmas Lights are a 20 m, 200-LED warm-white string designed for indoor or outdoor decorating, with eight lighting modes and a mains-powered adapter. The lights are described as waterproof, but the adapter must be kept protected from water.
At a glance
- Eight selectable lighting modes, including steady-on and twinkling options.
- Timer is described as six hours on followed by 18 hours off. A memory chip is claimed to retain the last lighting mode.
- The listing says up to three strands can be connected end to end, for a stated maximum of 600 LEDs and 69 m.
- The lights are presented for indoor and outdoor decoration, but the adapter is not waterproof.
Reference price: £11.99
Price checked: 13 Nov 2026
View offerAhead of Black FridayExplore the selectionPros and cons
Pros
- Long 20 m strand with 200 LEDs for decorating larger areas.
- Multiple modes and a timer give options for the lighting pattern and daily schedule.
- End-to-end connection is claimed for up to three strands.
Cons
- The power adapter must be kept away from water, which limits where the powered connection can be placed outdoors.
Technical specifications
17 specifications| Brand | Joomer |
|---|
| Light source | LED |
|---|---|
| Light colour | Warm White |
| Colour variant | Warm White-plug in |
| Lighting modes | Combination, In waves, Sequential, Slow Glow, Chasing/Flash, Slow fade, Twinkle/Flash, Steady on |
| Style | Traditional |
| Length per strand | 20m/66ft |
|---|---|
| LEDs per strand | 200 LED |
| Maximum connectable strands | maximum of 3 strands(maximum 600 LED 69m) |
| Power configuration | Corded Electric |
|---|---|
| Timer | 6hrs on/18hrs off |
| Memory function | Built-in memory chip, which can save your last lighting modes |
| Indoor/outdoor usage | Indoor, Outdoor |
|---|---|
| Waterproof claim | Waterproof |
| Theme | Horror, Space |
| Occasion | Halloween, Thanksgiving |
| Certification claim | UKCA certified |
What to know before buying
Listing details to confirm
The waterproof claim applies to the lights, while the listing explicitly says the adapter is not waterproof. Protect the adapter from water. The stated maximum of 69 m for three 20 m strands does not match their combined nominal length, so confirm the total length if it matters. The listing also describes themes as Horror and Space and occasions as Halloween and Thanksgiving despite marketing the product as Christmas lights.
Who is it for?
A good fit for
- Indoor or outdoor seasonal decorating where a mains socket is available.
- Buyers wanting several lighting patterns, a timer, and memory for the previous mode.
- Decorating areas where strands may be connected end to end, subject to the stated connection limit.
Less suited to
- Locations without access to mains power.
- Set-ups where the power adapter cannot be kept dry.
Frequently asked questions
Can these lights be used outdoors?
The listing describes them for indoor and outdoor use and calls the lights waterproof. It also says the adapter is not waterproof, so keep it protected from water.
How many lighting modes are available?
Eight modes are listed, including steady-on, slow fade, chasing or flashing, and twinkle or flash.
Can multiple strands be connected?
The listing claims a maximum of three strands, with up to 600 LEDs and a stated maximum length of 69 m. The length figure is inconsistent with three strands listed as 20 m each, so confirm the intended total length.
How does the timer work?
The timer is described as six hours on and 18 hours off. The listing says to activate it by double-pressing the adapter button until the green lights come on.
