Home > Products > Marine & Boat LED Bulbs > S25 Marine LED Bulb 25W | BA15d BAY15d BA15s 10-36V 48-80V
S25 Marine LED Navigation Bulb (25W Equiv) - IP66 Aluminum Glass (10-36VDC / 48-80VDC)
<
S25-39L marine LED navigation bulb 3W 300LM clear glass globe studio perspective
S25-39L marine LED bulb 39x SMD 3014 emitter array and nickel plated base
S25 marine boat bulb dual bottom contact detail and internal aluminum heat sink pillar
S25 marine LED lamp clear optical glass globe dome close-up
Pair of S25 marine LED navigation bulbs standing perspective studio display
>
Cross Reference / Direct Replacement
S25 Marine (Tubular & Globe 25W Incandescent Replacement)
BA15D (Dual Contact Parallel Pins Insulated Circuit)
BAY15D (Dual Contact Staggered Pins Single-Intensity)
BA15S / 1156 (Single Contact Parallel Pins P21W Equivalent)
1076 / 1142 (Marine Dual-Contact Bayonet Replacement)
10-36VDC (Marine 12V / 24V Battery Navigation System)
48-80VDC (High-Voltage Marine & Industrial Auxiliary Circuit)
IMO COLREG (Marine Sidelight & Masthead Lantern Compliant)

S25 Marine LED Navigation Bulb (25W Equiv) - IP66 Aluminum Glass (10-36VDC / 48-80VDC)

3.0W marine S25 LED navigation bulb delivering 300LM (replacing traditional 25W incandescent tungsten S25 lamps) with 39x SMD 3014 LEDs, IP66 aluminum-glass globe enclosure, single-intensity circuit, and available in BA15D, BAY15D, and BA15S bases across 10-36VDC and 48-80VDC power tiers.
Product Model:S25-39L
Socket / Base:BA15D / BAY15D / BA15S (1156 P21W Compatible)
Operating Voltage:10-36VDC / 48-80VDC (Factory-Discrete Driver Boards)
Power Consumption:3.0W (Replaces Traditional 25W Incandescent Tungsten S25 Marine Bulbs)
Luminous Flux:300 Lumens (360° Omnidirectional Optical Emission)
Color Temperature:6500K Daylight White · 3000K Warm White (Custom Signal Colors on Request)
LED Emitters:39x High-Efficiency SMD 3014 LEDs (Cylindrical Heat-Spreading Substrate)
Enclosure & Ingress:Precision CNC Aluminum Core + Clear Glass Globe | IP66 Marine Ingress Protection
Bulb Dimensions:Φ25mm × L50mm (Compact S25 Globe Envelope)
Circuit & Function:Single-Intensity Navigation Light (BA15D/BAY15D Single Mode, Not Dual Brake Light)
Primary Uses:Marine Navigation Lanterns, Marine Signal Lights, Vessel Sidelights & Equipment Signal Lamps
Quality & Warranty:CE (EMC Compliant), RoHS | 2 Years Factory Warranty
Inquire Now Next Product
×
🔍+ 🔍- 100% 💡 Scroll to Zoom | Drag to Move | Double-Click to Reset | Press ESC to Exit
  • Product Details

Marine S25 LED Navigation Bulb S25-39L (25W Incandescent Replacement)

The S25-39L is an industrial-grade marine and equipment indicator LED lamp designed as a direct solid-state retrofit for traditional 25W incandescent tungsten S25 globe bulbs. Built with a compact Φ25mm × L50mm envelope, precision CNC aluminum cooling core, and protective clear glass globe enclosure, it delivers 300 lumens of continuous 360-degree cylindrical light with superior vibration resistance for commercial marine and harsh industrial duty.

Single-Mode Electrical Architecture & Base Pinout Configurations

Engineered strictly for single-mode continuous navigation and indicator illumination. Available in BA15S (single contact, 1156/P21W compatible), BA15D (dual contact parallel pins, insulated circuit), and BAY15D (dual contact indexed offset pins). Note: BA15D and BAY15D bases operate in single-intensity mode (single brightness level) and are not dual-circuit brake lights. Click drawings to zoom:

S25 LED bulb single mode light function wiring diagram for BA15D, BAY15D, and BA15S bases
Single-Mode Circuit
BA15D / BAY15D / BA15S Pinouts
BA15S S25 P21W LED bulb 180 degree parallel pin diagram and 10-36VDC input
BA15S Base (P21W / 1156)
Single Contact · 180° Parallel Pins
BAY15D S25 marine boat light offset indexed pin configuration diagram
BAY15D Base (Indexed)
Dual Contact · Offset Staggered Pins
BA15D S25 marine boat light dual contact parallel pin dimensional diagram D25x50mm
BA15D Base (Standard)
Dual Contact · 180° Parallel Pins

Key Engineering Advantages Over Incandescent S25 Bulbs

  • Direct 25W Incandescent Replacement: Consumes only 3.0W while delivering a full 300 lumens, reducing navigational auxiliary circuit load by over 85%.
  • Filament-Free Vibration Resistance: 39 high-density SMD 3014 LEDs surface-mounted around an internal aluminum pillar withstand severe vessel vibration and engine resonance.
  • Marine Glass Globe Enclosure (IP66): High-transmittance optical glass globe paired with an aviation aluminum collar ensures corrosion resistance and IP66 ingress protection in salty coastal air.
  • Discrete Professional Voltage Tiers: Dedicated internal driver boards engineered for discrete 10-36VDC (shipboard 12V/24V batteries) or 48-80VDC industrial auxiliary loops.
  • Standardized S25 Outer Dimensions: Φ25mm globe diameter and 50mm total height fit perfectly into vintage and modern marine navigation lantern optics without physical interference.

Commercial Marine & Equipment Application Sectors

Marine Sidelights & All-Round Lanterns

Engineered for commercial fishing vessels, coastal cargo tugs, and yachts utilizing S25 bayonet lamp fixtures for masthead, stern, and anchor illumination.

Industrial Machinery Pilot Indicators

High-reliability indicator bulb for marine switchboards, offshore crane signal clusters, and industrial automation control consoles operating on 24V or 48V DC loops.

Navigation Buoy & Marker Towers

Continuous 24/7 duty cycle in remote marine navigation beacons and coastal fairway markers powered by solar battery storage banks.

Custom OEM/ODM Manufacturing & Voltage Engineering

As an integrated LED bulb manufacturer in Dongguan, China, we support flexible B2B wholesale customizations:

  • Base Customization: Standard BA15D, BAY15D, or BA15S (1156/P21W) bases with corrosion-proof nickel plating.
  • Dedicated Voltages: Factory-configured constant-current internal drivers for 10-36V DC or 48-80V DC.
  • Color Options: 6500K Daylight White, 3000K Warm White, Marine Signal Red, Marine Signal Green, and Amber Yellow.
  • Packaging Options: Neutral industrial master cartons, custom blister cards, or four-color retail packaging.

Frequently Asked Questions

Can the S25-39L bulb replace a traditional 25W incandescent S25 marine lamp?
Yes. The S25-39L consumes only 3.0W while generating a true 300 lumens of balanced 360-degree cylindrical light. It is engineered with standard S25 globe dimensions (Φ25mm × L50mm) to directly replace traditional 25W tungsten marine bulbs, reducing power consumption by over 85% while eliminating filament rupture caused by ship engine vibration.
What is the key electrical difference between the BA15D, BAY15D, and BA15S base options?
BA15S features a single bottom contact with 180° parallel pins (common ground through shell, compatible with 1156/P21W sockets). BA15D features dual bottom contacts with parallel pins (insulated circuit). BAY15D features dual bottom contacts with offset (staggered height) indexing pins for keyed one-way insertion.
Does the BAY15D version support dual-intensity (brake and tail light) operation?
No. The S25-39L operates in single-intensity mode (single continuous brightness level) across all base options. The dual contacts on BA15D and BAY15D provide an isolated two-wire circuit for marine electrical systems without chassis grounding. It is not designed for automotive dual-mode brake/tail lighting.
What is the official B2B wholesale MOQ and custom packaging policy?
Standard neutral factory packaging is available from 5 pairs for evaluation testing. For private-label custom branding (custom blister card or four-color retail box), the minimum initial packaging print run is 5,000 pieces, which is pre-funded and stored in our warehouse, then drawn down across repeat production batches.