Our outdoor LED lineup covers a wide range of applications, but two series get asked about the most: the O Series and the OHD Series. Here’s how they compare, and how to tell which one fits your project.
O Series: Built for Distance
The O Series is designed for outdoor displays viewed from a distance — think scoreboards, outdoor signage, advertising, digital architectural elements, and outdoor venues. If people won’t be standing close to the screen, this is the series to start with.
Pixel Pitch & Resolution
The O Series comes in five pixel pitch options — 4mm, 5.7mm, 6.67mm, 10mm, and 13.3mm — so you can match resolution to your typical viewing distance rather than paying for more resolution than your audience will ever notice. It’s also available in three panel sizes (960×960mm, 1280×960mm, and 640×960mm), giving you flexibility on both resolution and footprint depending on your space. Brightness runs up to 9,000–10,000 nits, more than enough to stay visible in direct daylight.
Build & Durability
The frame is aluminum-magnesium alloy, chosen specifically for corrosion resistance in outdoor environments, and the panel carries an IP65 rating for dust and moisture protection. Front and rear access makes both installation and servicing easier — you’re not stuck pulling an entire panel to fix one module. The O Series is also built to handle a wide temperature range, from -4°F up to 122°F, so it holds up in most U.S. climates without special accommodation.
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Configuration Options
Beyond a standard flat rectangular layout, the O Series supports right-angle corners and curved splicing, which opens up L-shaped installs, wraparound builds, and other non-standard configurations that a flat panel alone can’t handle.
OHD Series: Built for Close-Up Viewing
The OHD Series is Firefly’s higher-resolution outdoor option, built for spaces where viewers are much closer to the display — restaurants, bars, amenity decks, outdoor advertising, and wayfinding.
Pixel Pitch & Resolution
The OHD Series offers four pixel pitch options — 1.2mm, 1.5mm, 1.9mm, and 2.5mm — giving you a sharp, clear image even when viewers are standing just a few feet away. Despite that resolution, individual panels stay lightweight at around 21 lbs, which keeps installation manageable even for panels handled by hand rather than machinery.
Patented S-Latch System
Every OHD panel uses a patented S-Latch system, combining strong magnets with a locking mechanism for full front access. That means technicians can service a panel from the front without removing it entirely, while the same system helps prevent theft and keeps modules securely in place during high winds or in high-traffic environments. Every module is hermetically sealed and IP65-rated on both the front and back, protecting against dust and moisture from either direction.
Aspect Ratio & Corner Configurations
The panel is built in an 8:9 aspect ratio, which supports a wide range of configurations while still maintaining a true 16:9 display when that’s what your content calls for. It also allows 90-degree corner configurations using a 45-degree cut module, giving you one of the tightest seams available in the industry for wraparound or corner installs.
Permanent & Rental Options
Unlike some outdoor displays built for one use case, the OHD Series is available in both permanent and touring/rental configurations, so the same series can cover a fixed installation and a mobile setup without switching product lines.
Which One Is Right for You?
Both series share the same underlying build quality — energy-efficient operation, Smart Module technology, and a durable, weather-resistant design — so the real decision comes down to viewing distance. If your audience will be far from the display, the O Series gives you the resolution and durability you need at a lower cost. If viewers will be up close, the OHD Series delivers the sharper image that distance requires.
Not sure which fits your space? Get in touch and we’ll help you figure out the right series for your project.
