Product Overview
Most amber/green dual-color watermelon lights on the market rely on plastic lenses and multi-diode boards. The result is usually a soft glow, muted green output, and inconsistent color switching — especially noticeable with green.
The Glass is Class Duo Gen 2 was engineered to eliminate those compromises.
By combining a real tempered-glass star lens with the AlphaFit Duo bulb’s dual-bank LED architecture, this system produces long, sharp beam lines with zero center dark void. Amber delivers the traditional marker look, while green provides a vivid, high-contrast secondary color that instantly commands attention.
This is precision optics — not a novelty dual-color light.
Key Features & Benefits
Amber Primary / Green Secondary Dual-Color Output
The AlphaFit Duo bulb features two dedicated LED chip banks per side, one amber and one green.
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Amber for marker or clearance lighting
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Green for show, accent, or specialty use
When both color wires receive power, green automatically overrides amber, ensuring clean switching with no color blending or flicker.
AlphaFit Duo 23-Watt LED Bulb – Gen 2 Platform
At the core of the system is the 23W AlphaFit Duo bulb, purpose-built for Glass is Class optics.
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Single-function per color (no dim/high cycling)
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Full-power output on both colors
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Extremely small emission surface area for complete beam fill
Unlike the original hand-assembled Duo bulbs, the Gen 2 AlphaFit Duo is machine-manufactured with tight tolerances and strict QC, resulting in far greater consistency and long-term reliability.
Advanced Cooling & Moisture Management
The Gen 2 Duo uses the same proven thermal system as the Gen 2 single-color AlphaFit:
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Oversized anodized aluminum body
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Internal active cooling fan
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Passive heat-sink structure directly beneath the LED chips
This hybrid cooling design pulls heat away from the LEDs while creating positive internal pressure, allowing condensation to vent out naturally instead of being trapped inside the lamp.
Real Tempered-Glass Star Lens
Plastic lenses mute color and scatter light. Glass does not.
The Glass is Class tempered star lens:
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Produces long, crisp beam lines
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Preserves rich green color saturation
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Resists yellowing, scratching, and heat deformation
The result is a beam pattern that looks sharp, aggressive, and unmistakably premium.
Simple 3-Wire Control – No Mandatory 3-Way Switch
The AlphaFit Duo uses a simple 3-wire configuration:
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Ground
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Primary color (amber)
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Secondary color (green)
You can:
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Run amber on marker lights and trigger green separately
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Use a 3-way switch if desired
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Or wire green as a full-time override
Some competitive systems require a 3-way switch. The Glass is Class Duo does not.
Performance / Compatibility / Use-Case
The Amber/Green Duo Gen 2 is ideal for:
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Show trucks needing a unique secondary accent color
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Custom builds where green lighting is used for theme or branding
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Interior, exterior, or under-glow style installations
Thanks to the tight LED chip spacing and small emission surface area, the Duo Gen 2 produces a uniform, fully filled beam with no center dead spot, outperforming common 17- and 19-diode dual-revolution designs.
Installation / Fitment / Technical Details
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Voltage: 12V & 24V compatible
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Power Draw: 23W (active color)
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Bulb Base: Custom AlphaFit Duo (H11-style fitment)
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Wiring: 3-wire (ground, amber, green)
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Cooling: Active + passive hybrid system
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Lens: Tempered glass star pattern
Mounting brackets sold separately.
Build Quality / Warranty
The Gen 2 Glass is Class Duo represents a major evolution from the original Duo line:
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Machine-built bulbs instead of hand-assembled
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Much tighter manufacturing tolerances
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Significantly lower failure rates
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Improved heat and moisture control
Warranty: 1-Year Limited Warranty
Designed and validated by Alpha Series Lighting for real-world truck environments.
⚠️ Not SAE/DOT compliant
These lights are intended for show, off-road, and auxiliary use only due to extreme brightness.
What’s Included
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(1) Glass is Class Duo Gen 2 Watermelon Light – Amber/Green
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(1) Pre-installed AlphaFit Duo 23W LED bulb
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Integrated cooling system and venting
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Mounting bracket not included
Frequently Asked Questions
Is the green color bright or washed out?
The green output is deep, saturated, and clearly defined thanks to a dedicated green LED bank and glass optics. It does not appear pale or hazy.
Does green override amber automatically?
Yes. When both color wires are powered, green overrides amber every time.
Can I run amber as my marker and green only when triggered?
Yes. This is one of the most common wiring setups.
Is this the same bulb as the single-color AlphaFit?
It uses the same housing, cooling system, and engineering — but adds dual LED chip banks for dual-color control.
Is this waterproof?
The glass lens is sealed, and the bulb uses positive-pressure venting. It is weather-resistant and moisture-managed, not a fully potted plastic unit.
