MarineBeam
G4 18 Power 'Penta' Tower
G4 18 Power 'Penta' Tower
SKU:TW-G4-18
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 specificationsCouldn't load pickup availability
- Ships in 1–5 business days
- 30-day returns
- Advice from real cruisers
This is our new 120 Lumen G4 utility bulb. This bulb works great in small wall lamps, G4 anchor lights, and other applications like appliques, where 360 degrees of light is required. It features 18 leds, with 3 on each of its five sides, plus 3 on top.
Specifications
- Voltage 10VDC – 30VDC Constant Current
- Wattage 1.8W
- Amperage 0.15 amp
- Lumens 120 WW
- Beam Angle 360°
- Dimensions 23mm (7/8″) x 19mm (3/4″) +pins
2 Year Warranty
Fit check before ordering
G4 18 Power 'Penta' Tower should be matched to the existing fixture before ordering. The product name identifies the bulb or fixture family, but the final fit still depends on base, pin orientation, voltage, color, clearance, and the job the light performs.
| Check | Why it matters |
|---|---|
| Base or socket | G4, bayonet, wedge, festoon, MR11, and E26/E27 bases can look similar but fit differently. |
| Voltage and polarity | Marine DC systems vary, and some installations are sensitive to wiring, dimming, or polarity. |
| Color and use | Warm white, cool white, red, green, and dual-color options solve different cabin, cockpit, and navigation-light jobs. |
| Physical clearance | Tower, side-pin, back-pin, dome, and fixture housings can interfere with lenses or covers. |
Current selectable options
| Current page option | Visible values |
|---|---|
| Title | Default Title |
FAQ
Can I choose by bulb family alone?
No. Confirm the exact base, pin direction or offset, lens clearance, and color before ordering.
Is every LED suitable for a navigation light?
No. Navigation lights depend on fixture geometry, visibility sector, lens color, and output pattern. Use a navigation-specific bulb or fixture where required.
For more replacement choices, see LED replacement bulbs.
Shipping & lead times
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
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
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.
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
This is our new 120 Lumen G4 utility bulb. This bulb works great in small wall lamps, G4 anchor lights, and other applications like appliques, where 360 degrees of light is required. It features 18 leds, with 3 on each of its five sides, plus 3 on top.
Specifications
- Voltage 10VDC – 30VDC Constant Current
- Wattage 1.8W
- Amperage 0.15 amp
- Lumens 120 WW
- Beam Angle 360°
- Dimensions 23mm (7/8″) x 19mm (3/4″) +pins
2 Year Warranty