Mililier LED Light Kit for Lego 10375 Toothless Set Review
A Mililier LED light kit built specifically to fit the Lego 10375 How to Train Your Dragon Toothless set, powered by USB or a battery box, sold as the lighting kit alone without the brick set.
| Brand | Mililier |
|---|---|
| Compatible set | Lego 10375 How to Train Your Dragon: Toothless |
| Part / Model number | 10375 |
| Weight | 0.22 lb |
| Color | Black |
| Power options | USB or battery box (3 batteries, not included) |
| Best for | Owners of the Lego 10375 Toothless set who want to add lighting without a universal, non-fitted kit |
Product Overview
Mililier builds this as a fit-specific lighting upgrade for a single Lego set, the 10375 How to Train Your Dragon Toothless model, rather than a generic kit meant to be adapted to multiple builds.
The kit does not include any Lego bricks; it is lighting only, meant to be installed into an already-owned or separately purchased 10375 set to light it up after assembly.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
Built for the Lego 10375 Toothless set only.
Manual and video for distributed installation.
USB or a 3-battery battery box.
LED lines route between bricks, not exposed.
Help offered for installation issues.
Design and Build Quality
Both the part number and model number fields on the listing read 10375, matching the Lego set number the kit is designed for rather than a separate manufacturer code. The kit weighs 0.22 pounds and is finished in black, described as hand assembled ('craftsman-like handcrafting'), with the listing cautioning against pulling or shaking the connectors to avoid breaking the LED wiring during installation.
Installation instructions are delivered digitally: a QR code on the packaging links to a manual and video showing distributed, step by step placement of the lights between the bricks, with some existing Lego parts needing to be removed first to fit the wiring.
Performance in Everyday Use
Power can come from either a USB connection or a separate battery box. The battery box option needs three batteries the listing lists as '3A' size, which are not included in the kit, and the listing specifies the power supply must stay below 5 volts to avoid damaging the LEDs, a real limitation to plan around before improvising a power source.
Because the lighting is distributed and hidden between the bricks during a correct installation, the listing notes the wires should not be visible or look cluttered once the build is complete, and recommends test-lighting the kit before full installation to confirm every LED works.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Set compatibility | Lego 10375 Toothless | Listing states LED lighting designed specifically for Lego 10375 How to Train Your Dragon: Toothless Set | 8.3 | Confirms the stated fit compatibility |
| Weight | 0.22 lb | Listed item weight is 0.22 pounds | 7.9 | Confirms the stated kit weight |
| Installation guide | QR code, manual and video | Listing states scan the QR code on the box to get the installation manual and video | 7.8 | Confirms the stated installation support |
| Power options | USB or battery box | Listing states the LED kit can be powered by USB or a battery box | 7.6 | Confirms the stated power options |
| Battery requirement | 3 batteries, not included | Listing states using the battery box requires three 3A batteries, not included in the kit | 7.0 | Confirms the stated battery requirement |
| Power limit | Under 5V | Listing states the power supply should be less than 5v to avoid damage | 7.4 | Confirms the stated voltage limit |
Who Should Buy It
- Existing owners of the Lego 10375 Toothless set
- Builders wanting hidden, distributed LED wiring
- USB-powered display setups
- Buyers comfortable following a QR-linked install video
- Anyone who does not already own the Lego 10375 set, since this kit is light-only and lists as not including the building blocks
- Batteries for the battery box option are not included
- Power supply must stay below 5 volts or the LEDs can be damaged
- Installation requires removing some existing Lego parts and following a QR-linked guide rather than simple plug-in steps
- Does not include the Lego 10375 building block set itself
Full Specifications
How It Compares
| Feature | Mililier | Typical option | Higher-tier option |
|---|---|---|---|
| Set compatibility | Fit-specific to Lego 10375 | Universal, needs adapting | Comparable set-specific light kit |
| Installation guide | QR-linked manual and video | Printed instructions only | Comparable QR-guided kit |
| Power source | USB or battery box | Single power option only | Comparable dual-power kit |
| Wire routing | Hidden between bricks | Wires left exposed | Comparable hidden-wire kit |
| Included batteries | Not included | Batteries included | Comparable kit without batteries |
Alternatives Worth a Look



A fit-specific LED lighting kit for the Lego 10375 Toothless set, installed via QR-coded instructions and powered by USB or a battery box kept under 5 volts. It suits existing 10375 owners well, with the main catch being batteries are not included and the power limit needs attention.
Frequently Asked Questions
Does this include the Lego bricks?
No, it is LED lights only, not the Lego 10375 building block set.
What powers the LED kit?
Either a USB connection or a separate battery box, per the listing.
Are batteries included?
No, three batteries listed as '3A' size are required but not included.
How do I install it?
Scan the QR code on the box for a manual and video showing distributed installation.
Is there a power limit?
Yes, the listing says the power supply should stay below 5 volts to avoid damaging the LEDs.
What Lego set does this fit?
The Lego 10375 How to Train Your Dragon: Toothless set, per the listing.
This review is based on the manufacturer's stated compatibility, power requirements and installation process as listed. It is editorial analysis of the stated specifications, not independent hands on testing of this specific unit's fit inside an assembled 10375 set.