The red and orange decorations on LEGO® Family Christmas Tree 41843 look like little Christmas lights, but, as the video review points out, they do not actually illuminate. Once the room gets darker, those hidden rooms and tiny festive details can disappear into the branches.

A LEGO 41843 light kit can add an evening glow to your finished tree. The useful question is how to plan a LEGO Family Christmas Tree light kit around its opening panels, moving train and seasonal storage, so the display remains enjoyable to use.

This guide brings the video’s build observations together with BrickZoneHub’s current version prices and a practical lighting checklist. The video reviews the LEGO set; the installation guidance here is a planning guide to use alongside the instructions supplied with your light kit.

What Does the Video Reveal About Family Christmas Tree 41843?

There is much more here than a green cone covered in decorations. As shown in the video, the branches open to reveal miniature rooms, and turning the knobs at the base moves the train, the clock and the small tree in the elves’ recreation area.

The branches open to reveal miniature rooms — the details that benefit most from an evening glow

The reviewer highlights six separate building booklets, 24 numbered bags and an additional guide for taking the tree apart. You could spread the build across the run-up to Christmas, one bag at a time. Santa, Mrs Claus and five elves add plenty of character, particularly the festive jumpers on two of the elves.

The finished model has strong display potential. LEGO lists 3,171 pieces and closed dimensions of approximately 46 cm high, 33 cm wide and 35 cm deep. Allow additional space around it to open the branches and reach the controls.

Which BrickZoneHub LEGO 41843 Light Kit Should You Choose?

Start with the model number and the controls you want. Both listed versions are lighting accessories for Family Christmas Tree 41843; neither includes the LEGO build.

Classic £89 or Remote Control £99 — compare the supplied components before ordering

How Should You Plan Your LEGO 41843 Light Kit Installation?

A discreet finish comes from leaving access where the model needs it. Use the kit’s supplied routing instructions first, then apply the checks below. These are planning checks, rather than a claim that a particular cable route has been tested on this kit.

1. 1

   Choose the Display Position Before Fitting Lights

   Try the tree on its intended sideboard, shelf or display unit while it is still easy to move. Check the footprint, opening clearance and route to the USB power source. Keep the model away from the edge and leave access to both base knobs.

2. 2

   Test the Kit Using Its Specified Power Supply

   Check the light kit’s power label and instructions, then test the components before concealing them. Lay out the connectors without pulling on the wires. Disconnect the power before repositioning components, following the supplied instructions.

3. 3

   Plan Around the Tree’s Moving Sections

   Use this model-specific checklist while following the manufacturer’s installation sequence. It identifies areas to inspect, not a promise that the kit places a light in every location.

   Part of the tree	What to protect	Check before closing up
   Opening branches and panels	The hinge path and full opening movement	No wire pulls tight or becomes pinched when a panel moves.
   Workshop, kitchen and upper rooms	Room access and the view of small details	Any fitted wires avoid the main viewing openings and remain accessible.
   Train base and linked mechanisms	The train path, gears, axles and controls	Both knobs turn freely and no cable enters the moving parts.
   Sections separated for storage	Joints and any connections crossing them	You understand the kit’s disconnection procedure before lifting a section.

4. 4

   Conceal the External USB Lead

   Route the visible lead behind the display furniture with gentle bends and accessible connectors. Cable clips from B&Q or Screwfix can help organise the furniture-side lead. If sourcing a USB extension from Amazon.co.uk, match the connector and electrical requirements. Keep the kit’s fine internal wiring and connectors as supplied.

   The “zero-wire” aim is a clear normal viewing angle, rather than removing every cable or burying connections where they cannot be reached. Avoid forcing pieces together over a wire or trapping a lead beneath the model.

5. 5

   Repeat the Movement and Storage Checks

   Open and close the branches slowly, turn each knob and inspect the cable slack. Before packing the tree away, follow the LEGO dismantling guide and the light kit’s instructions together. Disconnect only at the intended connections; never pull sections apart against a cable.

Leave slack around the opening panels and keep cables out of the train mechanism

Does Warm White or Cool White Suit This Christmas Display?

My styling preference is a warm overall glow: it complements the green branches and the cosy feel of the small rooms. Colourful accents can also look festive, provided the details remain visible and the tree does not become a washed-out block of light.

A warm glow complements the green branches and the cosy rooms

Cooler room lighting can provide contrast, especially in a dusk photograph. Judge the effect from the actual kit photographs and your room.

What Power Supply Does a UK LEGO Christmas Tree Light Kit Need?

The BrickZoneHub kit is described as USB powered. Use a suitable UK three-pin USB adapter with an output that matches the kit’s own voltage and current requirements. UK mains electricity is nominally 230 V at 50 Hz; the adapter converts the supply for the low-voltage equipment.

Check whether a suitable adapter is included with your selected version. The product information reviewed does not establish an exact output rating or a complete adapter list, so follow the supplied specification rather than borrowing another brand’s power requirements.

Can You Switch the 41843 Light Kit with Alexa or Google Home?

A compatible UK smart plug may let you switch the USB adapter on and off through Alexa or Google Home. This controls the adapter’s power; it does not add app-based lighting effects to the kit.

Follow the smart plug manufacturer’s setup instructions and test whether the light kit comes back on after its power is restored. If its controller needs a manual button press, an automated power-on routine may not produce the result you want.

Where Can You Buy the Model and LEGO Christmas Tree Light Kit in the UK?

The LEGO model and the lighting accessory are separate purchases. These are the prices verified for this guide; other retailers’ current listings still need checking.

Prices checked on 20 October 2026. LEGO.com UK’s model price was £269.99 at the time of checking.

At these checked prices, the LEGO model plus the Classic light kit totals £358.99 before any extra power accessories. For a gift or a display planned for a particular date, allow time for delivery, building and lighting installation, and check the current delivery estimate before ordering.

Light Kit — Classic

Light Kit Compatible with LEGO® Family Christmas Tree 41843

£89

Shop Now

Light Kit — Remote Control

Light Kit Compatible with LEGO® Family Christmas Tree 41843

£99

Shop Now

How Can You Photograph the Illuminated Tree at Home?

Try the soft light of an overcast afternoon or the blue light just after sunset, with the kit switched on. Tap the brightest illuminated area on your phone screen and lower the exposure until the details stop clipping to white.

Support the phone for a longer exposure and switch off nearby lamps if they create distracting reflections. Take one image with the tree closed and another with the rooms open, keeping the camera position similar so people can see how the display changes.

Share your real installation with your local UK LEGO user group or photography community, following its posting rules. Tag the relevant community and BrickZoneHub where appropriate, and identify the light kit and LEGO model separately.

Frequently Asked Questions

Shop the BrickZoneHub Family Christmas Tree 41843 light kit, explore our LEGO Icons light kits, or read our UK guide to lighting other Icons builds.

Which detail would you most like to see glowing: the workshop, the upper rooms or the area around the train? Tell us in the comments. Watch the full video review for the build tour and subscribe to the creator’s channel for more seasonal set reviews.