// Contents
PropBuilds earns a commission if you buy through links on this page, at no extra cost to you.
The most-liked Halo energy sword to 3D print is Adafruit's, with 594 likes on Printables: NeoPixel LEDs in the blades, Bluetooth controls and an 86 cm (34 in) blade, with a full build guide. If you'd rather not print one, the licensed Halo Roleplay Energy Sword lights up and makes the in-game sounds.
How we picked them. PropBuilds indexes 22 energy sword files. We re-read the 13 on Printables live on October 1, 2026 (likes are that day's), and checked the Amazon swords below the same day. Notes come from each designer's description or listing.
The most-liked energy sword files
| File | Likes | License | Good to know |
|---|---|---|---|
|
Halo Energy Sword by Adafruit |
594 | CC BY | NeoPixel LEDs in the blades, Bluetooth control, an 86 cm (34 in) blade; full tutorial |
|
Halo Energy sword by ReProps |
276 | CC BY | Game-accurate at 300% scale; split it to fit most printers |
|
Dummy 13 energy sword by This_remix_guy |
143 | CC BY-NC-SA | Sized for the Dummy 13 figure |
|
Energy sword for LUCKY 13 by SirOhpacey |
139 | CC BY | Two halves, no supports, plus a full hand replacement |
|
Energy sword for Mini 13 by MadRobin13 |
132 | CC BY-NC-SA | Clips onto the figure's wrist ball joint |
|
Energy sword keychain by Thomas Kampouris |
115 | CC BY | Print it at least 65 to 70 mm long; sand the tips |
On MakerWorld, another Halo Energy Sword had 1,252 likes when our catalog recorded it on August 8.
Light-up builds
Adafruit's build puts NeoPixel LEDs in the blades, run by a Feather BLE 32u4 board with Bluetooth control and a 2000 mAh battery that recharges over USB; the learn guide has the full build. ArcLightDesigns' sword is built around a 9 volt battery pack and LEDs, with blades on dovetails so they swap out.
Full size, small and fun
ReProps scaled their sword up 300% to match the game, which needs splitting to fit most printers. For figures there are versions for Dummy 13, LUCKY 13 and Mini 13. And for the desk: a keychain, a headset stand shaped like the sword, and a LEGO-compatible one.
Rather buy one?
Energy swords you can buy, checked on Amazon on October 1, 2026:
- Halo Roleplay Energy Sword: 20 inches, pulsing light sequences and authentic Halo sound effects.
- Disguise deluxe light-up energy sword: 30 inches.
- Disguise classic energy sword: 25 inches, officially licensed, for costume play.
- Ukonic energy sword desk lamp: about 14 inches tall, for a desk.
The Halo gift guide has helmets and MEGA sets too, and the Halo print library lists every energy sword file.
FAQ
Can you 3D print a Halo energy sword?
Yes. The most-liked on Printables is Adafruit's, with 594 likes: NeoPixel LEDs in the blades, Bluetooth control and an 86 cm (34 in) blade, with a full build guide. ReProps' simpler version is game-accurate when scaled to 300%.
How big is a full size energy sword?
Adafruit's blade is 86 cm (34 in) tall. ReProps scaled theirs up 300% to match the game, which means splitting it to fit most printers.
Can I buy a Halo energy sword instead?
Yes. The licensed Halo Roleplay Energy Sword is 20 inches with light and sound, Disguise's deluxe light-up sword is 30 inches, and Disguise's classic costume sword is 25 inches. Links are below.
Is there a light-up energy sword to print?
Adafruit's is the full electronics build. ArcLightDesigns' sword has channels for a 9 volt battery pack and LEDs, with blades that swap out.
As an Amazon Associate I earn from qualifying purchases. The Amazon links on this page are affiliate links: check the current price and details on Amazon before you buy.
PropBuilds is a fan-run site, not affiliated with or endorsed by the studios or rights holders of the games mentioned.
Header photo: Halo Energy Sword by Adafruit on Printables, licensed CC BY; cropped, with an overlay added.