Planar Disc Architecture & Directional Downward Emission
The G4-16L circular LED disc bulb is purpose-built for shallow recessed downlights and surface puck light fixtures where traditional omnidirectional bulbs waste over 50% of their light output backwards into the fixture housing. By arranging 16 high-efficiency SMD 2835 diodes onto a 31mm round planar PCB, 100% of the luminous flux is directed downward across an optimized 120-degree beam angle, achieving superior lux levels on countertops, reading tables, and cabin berths at a modest 2.5W power draw.
Dual Mechanical Configurations: Back Pin & Side Pin
To solve the widespread mechanical fitment challenges across marine and RV lighting fixtures, the G4-16L disc series is manufactured in two dedicated pin layouts:
Color Temperature & Visual Ambience Options
Warm White (2700K-3000K) for relaxed marine salon & berth reading; Cool White (6000K-6500K) for high-visibility galley & utility task lighting.
Dimensional Blueprint (Back Pin vs Side Pin)
Compact Φ31mm disc format: center rear back-pin (20mm depth) vs edge horizontal side-pin (41mm span) for versatile fixture retrofitting.
Electrical Robustness & Smart Customization Options
Operating on a wide input range of 10-30VDC, the internal onboard constant-current regulator protects LEDs against alternator voltage surges, battery discharge fluctuations, and generator start spikes. For OEM yacht and premium recreational vehicle builders, specialized circuit configurations are readily available:
- 24V PWM Dimming Compatibility: Smooth 5%-100% duty-cycle dimming performance without audible buzzing or high-frequency optical flicker.
- Dual-Color CCT Switching: Factory-configurable dual-color option (e.g. Red Night Vision + Warm White 3000K) controlled via simple power switch toggling.
What is the difference between G4 Back Pin and G4 Side Pin configurations?
The difference lies in terminal pin placement relative to the lighting face: Back Pin features contact pins protruding perpendicularly from the center rear of the disc (Φ31mm × 20mm overall depth), designed for deep round puck fixtures and ceiling cans. Side Pin features pins protruding horizontally from the edge of the disc (Φ31mm × 41mm total span), designed for shallow slim pucks and horizontal reading sockets where space is constrained.
Why is a planar disc LED bulb better than a cylindrical omnidirectional bulb in ceiling puck lights?
In shallow recessed downlights and puck light enclosures, traditional cylindrical bulbs radiate half their light upwards into the reflector housing, where heat build-up and optical reflection losses reduce effective illumination. The planar G4-16L disc directs 100% of its 250 lumens downward directly into the living space, delivering 30% higher target lux levels while running significantly cooler.
Can this disc bulb operate on fluctuating 12V and 24V marine and RV battery systems?
Yes. The G4-16L integrates a wide 10-30VDC constant-current IC driver designed to absorb alternator charging spikes and battery voltage swings common in marine yachts, recreational vehicles, solar battery banks, and low-voltage landscape lighting transformers without flickering or premature diode failure.
What is the factory minimum order quantity (MOQ) and custom packaging policy?
Standard specifications are available from 5 pairs for initial evaluation and distributor sample verification. For customized commercial blister packs, printed gift boxes, or client OEM branding, the packaging printing MOQ is 5,000 units. The client pre-funds the custom packaging inventory, which is warehoused in our Dongguan factory and drawn down across rolling production orders.
