Hella Marine MLB 100 Micro LED Light Bar, Amber, 12-24V

The Hella Marine MLB 100 is a compact amber warning light bar built for boats that need to be seen. It's a fixed, permanent-mount micro bar packing 30 high-intensity LEDs into a 10-inch housing, and it runs anywhere from 12 to 24 volts with no converter. If you run a workboat, a pilot boat, a tender, a patrol or enforcement rig, or any utility craft where an amber caution signal keeps you and your crew safer, this is the kind of light you bolt on and forget about.

Amber is a caution color, not a navigation color, so think of this as a heads-up beacon rather than a running light. The 30-LED array throws a wide, punchy flash that reads clearly in daylight and lights up the water at night. You get 23 selectable flash patterns, so you can match local convention or just pick the one that grabs the most attention for your job. Pattern selection happens by cycling power, so plan your switch wiring before you button everything up. Once it's fused into a panel, changing the pattern means flipping the feed off and on to step through the list.

Power draw tops out at 50 watts, which is about 4 amps at 12 volts and roughly half that at 24. That means it drops right onto an existing 5-amp accessory circuit, the same kind you'd use for a horn or a set of spreader lights. One tip from guys who've rigged a few: on runs longer than 20 feet, step up to 14 AWG wire. Skimp on gauge and the voltage drop can make the light reset its pattern mid-flash, which is maddening to chase down later.

The MLB 100 is weatherproof to IPX5 and built to shrug off vibration, which matters on a planing hull that pounds. It's sized for smaller boats, center consoles, RIBs, and utility craft under about 26 feet, where a full-size bar would be overkill. On a big flybridge hardtop it'll look small, so match the light to the boat. If you're mounting to an aluminum T-top or a thin fiberglass surface, add a backing plate behind the fasteners. That spreads the vibration load and keeps the mounting holes from cracking out over a couple of seasons of hard running.

A word on the salt: the pigtail lead is the one spot to baby. Seal that connection with adhesive-lined heat shrink and keep it up out of standing water, because a saltwater environment will wick moisture into an unprotected splice over time. Do it right at install and you'll get years of trouble-free service. Running more than one bar? Heads up that there's no sync wire, so two units on a flash pattern will slowly drift out of phase with each other. Most crews don't mind, but if you want them locked together you'd need to wire them to a single matched feed.

Who's this for? Commercial and utility operators, mostly. Marina service boats, dredging and dive support, dock and piling crews, harbor patrol, and anyone working slow in a channel where other traffic needs a clear warning. Plenty of recreational boaters run them too, on tenders and RIBs that shuttle in low light, or as a caution flasher when anchored somewhere busy. The permanent bolt-on base is the right call for a light that lives outside full time. It won't slide around, it won't walk off in a chop, and it sits low enough that it won't snag a line.

Hella Marine has been building fit-and-forget lamps for decades, and the MLB 100 follows that mold. High-grade LEDs, a sealed housing, and a black low-profile base that disappears against most hardware. Bolt it to a T-top, a radar arch, a cabin roof, or a bracket, wire it to a switched and fused feed, and you've got a serious amber signal that draws next to nothing and keeps working season after season.