Battery Run Time

We Recommend using “Deep Cycle Batteries” to power your lights. “Car” batteries and “Marine Starting” batteries are not designed to be quickly discharged and recharged on a regular basis. These types of batteries will run down much faster than a Deep Cycle Battery and your light will not burn as bright or as long as it should.

A Simple Formula to find out how long a light will run off of your particular battery is to take the batteries “amp-hour rating” and divide it by the average load in amps. So, a 115-amp hour battery running a 100-watt AquaStar that pulls 8-amps should last approximately 14.4 hours (115/8) on a 115 amp hour deep cycle battery.

Lights By Comparison

Run times shown below are using a Group 27, 12VDC, 100-amp hr. Deep Cycle Battery.

ModelUse OnlyVoltage/WattageTypeAmpsLumensRun-Time*
AquaStarUnderwater12VDC, 100-wattsHalogen8.31,90012
MAGNUMUnderwater120VAC, 300-wattsHalogen2.54,800N/A
SuperBrite 2500-X2Underwater12VDC, 54.5-watts*(192) SMD5730 LEDs*See BelowSee Below
SuperBrite 8000-X2Underwater12VDC, 110-watts*(432) SMD5730 LEDs*See BelowSee Below
DockPro 3500Above Water120VAC, 44-watts(44) 1-Watt LEDs0.43,500N/A
DockPro 5000Underwater120VAC, 50-watts(1) 50W COB LED0.425,000N/A
DockPro 10000Underwater120VAC, 100-watts(2) 50W COB LEDs0.8310,000N/A
DockPro 16000Above Water120VAC, 150-watts(210) 3030 LEDs1.2516,203N/A
FlounderPro 3000Underwater12VDC, 30-watts(90) SMD3030 LEDs2.52,85040
FlounderPro 2000Underwater12VDC, 30-watts30 Watt COB LED2.52,850See Runtime
FlounderPro 8550Underwater12VDC, 90-watts(3) 30-Watt COB LEDs7.58,55013
FlounderPro 2850Underwater12VDC, 30-watts30-Watt COB LED2.52,85040
GTX-3800Above Water12VDC-24VDC, 45-watts(15) 3-watt LEDs3.73,80027
GTX-11000-ACAbove Water120VAC, 100-watts(220) White LEDs0.8310,394N/A
GTX-11000-DCAbove Water12VDC-24VDC, 100-watts(220) White LEDs8.310,39412
GTX-16000Above Water120VAC, 150-watts(210) 3030 LEDs1.2516,203N/A


SuperBrite 2500 X-2

ColorLumensWattageAmpsRun Time
Green Light111027.92.340
White Light130226.52.147
Green+White Combined241254.54.422

SuperBrite 8000 X-2

ColorLumensWattageAmpsRun Time
Green Light3834655.418.5
White Light407245.33.727
Green+White Combined7907110.39.111


Color can make a Difference

While Green Light is popular these days, there are times White Light will outperform Green Light.

Many of our SuperBrite-X2 customers tell us using BOTH White and Green combined produces the most fish.

Calculating Run Time

To find out how long a light will run on these batteries, take the Amp Hours and divide it by the amp draw of the light. For example, a 50-watt AquaStar draws about 4 amps. So, a 18 amp hr. battery would run the light for 4.5 hrs. (18/4= 4.5) and a 40 amp hr. battery would run it for 10 hrs. (40/4=10)

Full Size Deep Cycle Batteries

Battery TypeAmp Hour RatingVoltage
Group 27100-115 Amp Hours12 Volts
Group 29110-125 Amp Hours12 Volts

Compact Deep Cycle Batteries

For those of you who need a smaller battery that will fit in a back pack, the compact batteries listed below will provide good light for a limited amount of time.

To find out how long a light will run on these batteries, take the Amp Hours and divide it by the amp draw of the light. For example, a 15-watt COB draws about 1.25 amps. So, a 18 amp hr. battery would run the light for 14.4 hrs. (18/1.25= 14.4)

battery diagram

Starting Batteries vs Deep Cycle Batteries

Both “Starting” batteries and most “Deep Cycle” batteries are lead-acid batteries that use exactly the same chemistry for their operation. The difference is in the way that the batteries optimize their design:

A “Starting Battery” is designed to provide a large amount of current for a short period of time.

This surge of current is needed to turn the engine over during starting. Once the engine starts, the alternator provides all the power that the car needs, so a starting battery may go through its entire life without ever being drained of more than 20 percent of its total capacity. Used in this way, a starting battery can last a number of years. To achieve a large amount of current, a starting battery uses thin plates to increase its surface area.

A “Deep Cycle Battery” is designed to provide a steady amount of current over a long period of time.

A Deep Cycle Battery can provide a surge when needed, but nothing like the surge a car battery can. A deep cycle battery is designed to be deeply discharged over and over again (this is something that would ruin a car battery quickly). To accomplish this a deep cycle battery uses thicker plates.

A Starting Battery typically has two ratings: CCA (Cold Cranking Amps) – The number of amps that the battery can produce at 32 degrees F (0 degrees C) for 30 seconds.

RC (Reserve Capacity) – The number of minutes that the battery can deliver 25 amps while keeping its voltage above 10.5 volts.

Typically, a Deep Cycle Battery will have two or three times the RC of a Starting Battery, but it will deliver one-half or three-quarters the CCAs. In addition a deep cycle battery can withstand several hundred total discharge/recharge cycles, while a Starting battery is not designed to be totally discharged before recharging.

The bottom line is… Use Marine “Deep Cycle Batteries” for your lights and trolling motor, and a “Marine Starting battery” for starting your boat.

Notice: For best performance a Group 27, 115 amp hr. Deep Cycle battery or better is recommended. While these lights are extremely bright, they require sufficient amperage to operate at maximum brightness. If you are using a generator or have an AC outlet on your dock, you can power your lights with a AC to DC converter or battery charger. Also see 120VAC lights.

Always use a converter that puts out more amperage than you need. The more amperage…the brighter the light will be!

Your lights are only as good as your battery or power supply.


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