MarineBeam

Davis Megalight Replacement Bulb

$ 12.50 USD

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Shipping calculated at checkout.

SKU:BA-9S-12 -CW

Marine LED replacement lighting. Match the exact base or pin layout, system voltage, light color, and available lens clearance before ordering.

See fit checks and full product specifications

Color Cool White Warm White Red Green Blue

Ships in 1–5 business days
30-day returns
Advice from real cruisers

Multi-volt (10-30VDC) BA9S bulb for those looking for something brighter than the typical 5W incandescent found in many boat lamps such as the Aqua Signal Series 15, Series 20, Portofino, Toronto, and Palma types.

9mm single-contact base with 12 super high-efficacy 3014 type LEDs arrayed in 360° around the bulb, giving a true isotropic output. The output of this lamp rivals that of a 10W incandescent (100 lumens) - much brighter than the typical 5W incandescent while fitting in even the smallest fixtures.

This BA9S LED lamp replaces the Davis Megalight bulb, Aqua Signal 90282, 90247, 90496, and 90384 bulbs. It also replaces Hella part numbers BYL125, BHL126X, BHL124, and BHL244 bulbs. If using in Series 20 Sidelight type Navigation Lights, choose red/green respectively to maximize light output and visibility through colored lenses.

Note: The Aqua Signal 90470 (20W) high output bulb found in Aqua Signal Combination Masthead/Foredeck Lights requires our BA 9S 5W LED bulb.

Specifications

Voltage: 10VDC – 30VDC Constant Current
Wattage: 0.7W
Amperage: 0.06A at 12V
Lumens: 100 (WW), 120 (CW)

2 Year Warranty

Technical Specifications

Base / socket	BA9S
Voltage	10-30VDC
Power	5 W
Light output	100 lumens

Multi-volt LED electronics are polarity-protected and built for the marine 12/24 V DC environment. Not sure this is the right base or fixture for your boat? Contact us with a photo of your old bulb or fixture and we'll confirm fit.

Shipping & lead times

We're a small team of boaters and we pack orders within 1–5 business days (no weekend or holiday packing). You'll get an email with tracking as soon as a label goes on your box.

Specialty items — fire extinguishers (dangerous goods) and low-stock or built-to-order gear — can take longer; the product description will say so. On a tight timeline or meeting your boat somewhere specific? Contact us and we’ll work out the fastest way to get gear to you.

International orders ship DDU: local duties, taxes, and customs fees are the buyer’s responsibility. Full details in our shipping policy.

Returns & refunds

30-day returns from the date of purchase. Items must be unused, in the original packaging with all cables and accessories, with proof of purchase.

Contact us before shipping anything back — we’ll send the return form that must accompany your return. Fire extinguisher and lithium battery items carry a $15 administrative fee on returns.

Read the full refund policy.

Ask a cruiser before you buy

Everyone here is a current or past cruiser — we’ve docked short-handed, re-rigged at anchor, and chased 12V gremlins too. Not sure this is the right fit for your boat? Send us your question before you order and we’ll give you a straight answer.

Davis Megalight Replacement Bulb $ 12.50

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Check fit before ordering

Base and pins: match the socket, contact count, pin position, orientation, and spacing to the lamp being replaced.
Electrical fit: verify the DC voltage range, polarity requirements, and compatibility with existing dimmers.
Physical clearance: compare the full bulb diameter, height, pin length, lens, and reflector clearance.
Light output: choose the intended color, temperature, beam pattern, and navigation or cabin-light use.

Product specifications and details