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LED stands for Light Emitting Diode. Instead of using a filament like older bulb types, LEDs create light by moving electricity through a semiconductor material. This method is much more efficient and produces very little heat compared to halogen or incandescent bulbs.
Key points about LEDs:
In short, LED lights are modern, efficient, and versatile, which is why they are becoming the standard choice for boat lighting.
Halogen bulbs are a type of incandescent light that uses a tungsten filament sealed inside a small quartz capsule filled with halogen gas. When current passes through the filament, it becomes hot enough to glow, producing light.
Key points about halogen bulbs:
Halogen lights remain popular for their low upfront cost and warm appearance, but their energy use and shorter life make them less efficient over time.
To compare LED lighting to Halogen and Incandescent lighting, we must first understand the key terms used to describe the two: wattage and lumens.
Simply put, wattage measures how much energy is consumed by the fixture or bulb. This can also be measured in Amperes (commonly: Amps), for which the equation is: Amps = Watts / Volts, or Watts = Volts x Amps. While halogen and incandescent bulbs are most commonly rated by wattage, this does not actually describe the amount of light the bulb is outputting.
This is the key term used to describe light output, and most commonly how LED bulbs and fixtures are rated and described. It is a fixed number, measured only in a lighting sphere, and is not related to distance away from that fixture. If a light puts out 200 lumens, it does so at 10’ or 100’ away.
In some instances you will see two ratings; “Raw Lumens” and “Fixture Lumens”. Raw lumens refer to the lumen output of the individual LED operating with no obstruction. Fixture lumens refer to the light output of the whole fixture, accounting for any inefficiencies of the fixture like a frosted lens or a reflector within the fixture. Fixture lumens are more important to consider when comparing lights, as this rating is the actual amount of light you will see.
When considering a switch from halogen or incandescent fixtures, it’s important to understand how LED technology performs in a marine environment. LED lights bring several key advantages that have made them a popular choice among boat owners including:
LED light fixtures and bulbs are far more power-efficient than their halogen equivalents. For example, an LED fixture with a light output equivalent to a 25-watt halogen bulb may actually consume only 4 or 5 watts. If your boat has 20-30 fixtures on board, that power savings really adds up, and reduces the number of DC batteries needed to power the circuit or the frequency at which the batteries need to be recharged.
If you’re a cruiser that spends more time at anchor or on a mooring than you do plugged into a dock, this energy saving means less time spent running your engine or generator to keep your boat lit up at night. This is particularly true for sailors who don’t spend much time running the engine while underway.
Halogen and Incandescent lighting use a heated filament to emit light. That filament, as it heats up, emits lights in all directions equally, meaning that downlight with a filament bulb is throwing just as much light upwards into the body of the fixture, as downwards towards the space it is meant to illuminate.
By comparison, an LED fixture uses diodes which emit light in only one direction. This means an LED fixture would emit light only in the specific direction it is intended to. This means very little of the light output is wasted by throwing light in directions the fixture isn’t intended to throw light.
While most quality LED fixtures and bulbs are dimmable, the process by which they are dimmed is different from that of halogen or incandescent bulbs. A filament bulb is dimmed simply by decreasing the amount of electricity that passes through it. That means the dimmer required is a simple device like a rotary knob that either increases or decreases the amount of electricity that reaches the bulb.
Because LED fixtures are essentially electronic devices, they are dimmed using a digital signal called Pulse Width Modulation (PWM) that is essentially turning the light off and back on so rapidly that it is not perceived by the human eye. Because this process is a bit more complicated, the dimming modules required to dim LEDs are often more expensive.
The difference in dimming processes becomes a particular disadvantage for re-fitting your boat from halogen to LED if you use dimming. It means that not only the fixtures or bulbs must be replaced, but also the dimmer and often the switch that controls the dimming as well.
While it’s more of a matter of personal preference and perception, some people do feel that the light emitted from an LED is too harsh, or bright. While evolving LED technology has started eliminating this issue, there are still many LED fixtures and bulbs that struggle to replicate the “warm” glow of a halogen or incandescent bulb. When choosing an LED, it is always important pay attention to the color temperature of the bulb or fixture, which is measured in Kelvin. The warm color of an incandescent bulb is around 2800K. If you’re looking for an LED fixture that will replicate that warm color, make sure you check that the LED has a temperature near 2800K.
Feature | Halogen Lighting | LED Lighting |
|---|---|---|
| Light Output | Bright, warm light with good color rendering; less range and brightness than Xenon | Bright, clear light with strong color rendering; capable of illuminating significant distances |
| Efficiency | Less efficient; generates more heat and consumes more power | Most energy-efficient; uses less power and converts more into light rather than heat |
| Durability | Short lifespan (2,000–4,000 hours); fragile filament sensitive to oils | Long lifespan (25,000–100,000 hours); resistant to shocks, vibration, and harsh conditions |
| Cost | Least expensive upfront; bulbs are easy to replace | Higher initial cost but lower long-term maintenance and replacement needs |
| Use Case | Suitable for smaller vessels or near-shore operation | Versatile option for recreational boats, commercial vessels, and navigational aids |
Not always. While many LED bulbs are designed as direct replacements for halogen bulbs, there are a few things you need to check before swapping them.
Key factors to consider:
The bottom line: LEDs and halogen bulbs are not always interchangeable. Before switching, confirm that the voltage, fit, and dimming setup all match your boat’s system.
To determine whether or not you should convert your boat’s lighting to LED, be sure to keep these factors in mind.
It’s an obvious question, but be sure to consider how often you really have a need to use the lights on your boat. If you’re only turning them on one or two times per year, it’s probably not worth the cost and effort to convert to LED.
Your use of battery power is an important consideration. If you’re someone that’s constantly running your engine or generator to charge your batteries, you may want to consider LEDs to reduce the demand on the batteries, meaning you won’t have to charge as often.
The number of fixtures matters for two reasons. From a power consumption standpoint, if you have many halogen or incandescent fixtures, converting to LEDs will result in a big savings in power consumption.
From a cost standpoint, replacing many halogen or incandescent fixtures with LED fixtures could stretch your budget thin.
These are just a few questions to consider when contemplating converting your boat from halogen or incandescent to LED lighting. Of course, the overall “project list” for your boat will also come into play, along with your budget, type of boat, and boating habits.
For more info on LED lighting, check out our article The Benefits & Challenges of Installing LED Lights on Your Boat.
Halogen bulbs create light by heating a filament, which produces a warm glow but also generates more heat and uses more power. LED bulbs rely on light-emitting diodes that produce a bright, focused beam while consuming far less energy. Because of these differences, halogen bulbs are generally less efficient with a shorter lifespan, while LEDs last longer and require fewer replacements.
No, halogen bulbs generally consume more power and give off more heat, while LEDs are designed to be more energy-efficient. The difference in power use can affect how often you need to recharge your boat’s batteries.
Halogen bulbs usually last between 2,000 and 4,000 hours, while LED fixtures can last anywhere from 25,000 to 100,000 hours. Actual lifespan will depend on the quality of the fixture and how the boat is used.
In many cases, yes, but it depends on the fixture and electrical setup. Some conversions may require replacing dimmers or switches to work properly with LED technology.
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