TimberVolt® Firefly™ Outdoor Power Post
Simple, Concealed Power
One pre-wired outlet, hidden in the timber — plug in and go.
What Is the TimberVolt® Firefly?
The Firefly™ is the most compact power post in Western Timber Frame’s patented TimberVolt® line — a pre-wired timber post with one concealed, weather-resistant outlet mounted high on the post, so you can plug in string lights, a fan, or a charger with no electrician, no trenching, and no exposed wiring.
Like every TimberVolt® post, the Firefly™ runs its wiring through a 1.25-inch channel bored down the center of a 6×6 or larger timber, to National Electrical Code (NEC) standards. It arrives factory pre-wired and sealed — ready to plug in and use.
Part of the TimberVolt® system, protected under U.S. Patent No. 10,053,861 — “Power Distribution Post for Use in Timber Frame Structures.”
What’s Built Into Every Firefly?
Every Firefly post arrives factory pre-wired and sealed, with a single clean outlet set high on the post — easy to reach for string lights, a fan, or a charger, and protected for every season. Western Timber Frame bores that 1.25-inch channel on a CNC machine before the post is stained and wired.
High-Mounted Outlet
One weather-resistant outlet with a premium sealed cover, set high on the post near the beam.
Sealed Top Cap
Caps the top of the post to keep water and debris out of the internal wire channel.
Compact, Low Profile
A slim silhouette that delivers power without drawing the eye.
Plug-and-Use
Arrives factory pre-wired — no electrician, no on-site wiring, no guesswork.
Firefly at a Glance
- Pre-wired
- Yes, factory-sealed
- Outlet
- 1, weather-resistant (high-mounted)
- USB / TV
- No
- Post size
- 6×6 or larger
- Wiring channel
- 1.25-inch, concealed
- Electrical code
- NEC standards
- Patent
- U.S. 10,053,861
- Best for
- String lights, fans, chargers, low-profile power
Where Does the Firefly Fit Best?
The Firefly® is ideal for outdoor spaces that need one simple, weather-protected outlet — without hardwiring, bulky boxes, or exposed conduit. Common uses include:
- Pergolas and trellises with string lights
- Outdoor swings and seating areas
- Low-profile charging stations for patios
- Landscape and pathway lighting
- Plug-in water features, fans, or audio systems
- Any timber structure that needs one clean outlet
The Firefly Power Post, From Every Angle
Four labeled views of the Firefly™ — ISO, front, side, and back — showing the outlet placement and the concealed wire channel inside the post.




A Dovetailed Timber Post at Its Core
The Firefly isn’t just wiring — it’s a solid, dovetailed timber post. Like every TimberVolt® post, it’s built on Western Timber Frame’s patented Dovetail Difference®: a trapezoidal joint that interlocks the timbers together without a single metal bracket.
The wedge shape lets the timber flex and settle naturally with the seasons instead of loosening over time, and because no exposed steel holds it together, there’s nothing to rust or corrode. The post that carries your power is made to last for generations. Seasonal movement is one load; wind is another, and Western Timber Frame engineers these frames to a 115 mph standard design wind speed, higher where the site requires it.
Learn More About the Dovetail Difference®
Firefly Questions
What is the TimberVolt Firefly?
Is the Firefly pre-wired?
Does the Firefly have an outlet or a light switch?
Where is the Firefly outlet located?
What can I plug into a Firefly?
What size post does the Firefly need?
Is the Firefly wiring up to code?
How is the Firefly different from the other TimberVolt models?
Explore the Other TimberVolt® Models
Phoenix®
Pre-drilled and box-ready for a switch and an outlet.
View PhoenixDragon®
Fully wired with a GFCI outlet and plug-and-play setup.
View DragonInferno®
High-capacity: outlets, USB, TV, and fan control.
View InfernoDrill For Power
Custom-drilled timber post for site-specific wiring.
View Drill For PowerNot sure which model fits your project? We’ll help you plan the right TimberVolt® setup.
Built nationwide · Recognized at home
7,000+ outdoor structures built.
One standard of craftsmanship.
Across the United States, Canada and Hawaii.
28 Best of State awards
Designed, manufactured, and crafted in the USA
Projects across all 50 states & Canada

