Most golf cart lighting upgrades start with strip lights or underbody kits, but a light bar is what actually lets you see the path, not just be seen on it. This guide covers choosing the right light bar for a golf cart and wiring it in cleanly, whether you are running a stock 36V or 48V cart or a lifted, street-legal build.
Shop the full lineup in the Black Oak LED golf cart light bar collection or see the golf cart lights overview, then come back here for the install walkthrough.
How do you wire lights on a 36V or 48V golf cart? Black Oak LED lights run on 12 to 30V DC, and a 36V or 48V pack is above that range. Run the lights through a DC-DC voltage reducer (36V or 48V in, 12V out) fed from the key-switched side of the cart.
- Size the reducer: total watts ÷ 12 × 1.25, rounded up to the next reducer size.
- Do not tap a single battery in the pack. It unbalances the bank.
- Use the fuse and relay that ship in the Black Oak harness.
How do you wire 12V lights on a 36V or 48V golf cart?
The idea is the same on both voltages. The pack feeds a voltage reducer, the reducer feeds a normal 12V light circuit, and the reducer is switched by the cart's key so the lights cannot drain the pack while the cart is parked. Pick your cart's voltage below.
A 36V pack is commonly six 6V batteries or three 12V batteries in series. The reducer is a 36V to 12V unit.
A 48V pack is commonly six 8V batteries or four 12V batteries in series. The reducer is a 48V to 12V unit.
What size voltage reducer do you need for golf cart lights?
Size the reducer to the total load, not to one light. Add the rated watts of everything on the circuit, convert to amps at 12 volts, then leave 25 percent headroom so the reducer is never run at its limit.
Then round up to the next reducer size. Reducers are commonly sold in 10, 20, 25 and 30 amp ratings.
| Light | Rated watts | Listed amp draw | Amps at 12V (watts ÷ 12) | Reducer to buy |
|---|---|---|---|---|
| 10 inch single row, 3 watt build | 30 W | 2.9 A | 2.5 A | 10A reducer |
| 10 inch single row, 5 watt build | 50 W | 3.3 A | 4.2 A | 10A reducer |
| 10 inch double row, 3 watt build | 60 W | 4.0 A | 5.0 A | 10A reducer |
| 10 inch double row, 5 watt build | 100 W | 4.1 A | 8.3 A | 20A reducer |
| 2 inch pod, 20 watt | 20 W | 1.7 A | 1.7 A | 10A reducer |
| 2 inch pod, 40 watt | 40 W | 2.8 A | 3.3 A | 10A reducer |
| LED rock light, each | 9 W | 0.35 A | 0.8 A | Add to the total |
Rated watts and listed amp draw come from each light's Specs tab, checked Oct 2, 2026. The reducer column is computed from rated watts at 12 volts, the conservative method, so it can exceed the listed amp draw.
Worked example: a 10 inch double row bar (100 watts) plus two 2 inch pods at 40 watts each is 180 watts. 180 ÷ 12 = 15 amps, × 1.25 = 18.75 amps. A 20 amp reducer covers it. The harness on each 10 inch bar carries a 10 amp inline fuse and the harness on each 2 inch pod carries a 5 amp fuse, so every light stays protected on its own branch.
Is my golf cart 36V or 48V? Club Car, EZGO and Yamaha quick reference
Model alone does not settle it, because carts get repacked and converted. Count the batteries and multiply by the voltage printed on each case. Here is what the battery guides below report.
Club Car
DS: 36V is six 6V batteries. DS carts at 48V use six 8V or four 12V.
Precedent: six 8V batteries are common.
Onward and Tempo: lead-acid or factory lithium depending on trim.
E-Z-GO
TXT: a traditional 36V TXT uses six 6V batteries wired in series.
A 48V TXT may use six 8V or four 12V batteries.
Yamaha
Older G-series: commonly 36V, six 6V or three 12V batteries.
Drive and Drive2: commonly 48V, six 8V, four 12V, or a lithium drop-in pack.
Sources: RoyPow Club Car battery guide, RoyPow EZGO TXT guide, RoyPow Yamaha guide. Reducer ratings and the one-battery tap warning: Epoch 48V to 12V reducer page. Always confirm with your cart's own battery labels.
Choosing a Light Bar for a Golf Cart
Golf carts have less roof and bumper real estate than a truck, so size and mount point matter more than raw output. A 10 inch single or double row bar is the most common choice for a windshield-frame or roof-rail mount: enough spot and flood coverage for a cart path or a hunting lease road without overhanging the frame. A 20 inch bar fits carts with a wider roof rail or a front brush guard and suits mixed-use carts that also see truck-width trails. Combo optics (spot and flood together) cover both distance and side visibility, which matters more on a cart than on a vehicle with factory headlights to fall back on.
The 5 watt builds are the ones to look at first on a 10 inch bar: the 10 inch double row 5 watt build lists 13,200 raw lumens against 7,500 for the 3 watt build, and the single row 5 watt lists 6,600 lumens against 3,700. Each light is military grade and IP69K rated, which means it is rated against high-pressure water and dust, so a wash-down or a wet morning on the course is fine.
Mounting options: windshield-frame brackets are the cleanest install on a factory windshield cart and need no drilling into fiberglass. Roof-rail brackets suit lifted carts with an aftermarket roof. A front brush-guard or bumper mount works on utility and off-road carts that already carry one. For help picking a spot, see LED light bar mounting locations.
What You Need Before You Start
- LED light bar (Black Oak LED light bars include a 12 foot wiring harness with inline fuse, relay and switch)
- Mounting brackets sized to the bar
- A DC-DC voltage reducer sized with the formula above (36V or 48V in, 12V out)
- Wire strippers, crimp connectors, cable ties, a drill, and a multimeter
- Safety glasses and gloves for any fiberglass drilling
Golf carts run their batteries in series to reach 36V or 48V. Pulling 12V from one battery in that bank draws it down faster than the others and unbalances the pack, and it is not possible at all on a single lithium pack. That is why the reducer, which draws evenly from the whole pack, is the setup this guide recommends.
How do you install lights on a golf cart, step by step?
- Disconnect the battery bank.Negative cable first, then positive, and secure both so they cannot swing back into contact.
- Mount the light bar and the switch.Dry-fit the bar in its bracket and confirm beam angle and clearance before final tightening. Mount the switch somewhere reachable from the driver's seat.
- Mount the reducer and feed it from the key-switched side.Wired after the cart's main power switch, the reducer protects the lights from the pack's full voltage and only draws power when the cart is on, so it will not drain the batteries overnight. Fuse its input as its maker specifies.
- Run and secure the wiring.Route the harness along the cart's frame using existing channels where possible, away from moving parts and any heat source. Use grommets anywhere the harness passes through a drilled panel, and zip-tie the run at regular intervals so nothing hangs loose or chafes.
- Connect the harness to the 12V side.Join the harness to the light bar through the included waterproof connectors, then to the reducer's 12V output, matching polarity throughout. A multimeter confirms the correct voltage at each stage before you button everything up.
- Reconnect the battery and test.If a light does not come on, check polarity first, then the inline fuse, then the voltage at the harness connector with the multimeter.
Street-Legal Carts Need More Than a Light Bar
A light bar adds forward visibility, but it does not make a cart street legal on its own. Most states require working headlights, tail lights, brake lights, and turn signals before a golf cart can run on a public road, and those requirements are separate from any auxiliary light bar. Check your state and local rules before relying on a light bar as your only lighting upgrade.
Add RGB underbody lighting: rock lights and strip lights
The light bar handles the path ahead. RGB underbody lighting is what makes a cart stand out after dark, and on a cart it is a big part of the build. There are two ways to do it: RGB rock lights under the frame and in the wheel wells, and the Fathom RGB strip light along the rocker or under the seats. Both run off the same 12V reducer as the light bar, and the waterproof RGB Bluetooth controller lets you pick the color and dim it from your phone. One controller runs up to 12 rock lights.
RGB Rock Light Kit, 8 LightsPlug and play harness, colors from a Bluetooth app.Shop now
RGB Rock LightsAdd lights one at a time. Up to 12 per RGB controller.Shop now
Fathom RGB Strip LightRuns along the rocker or under the seats. 10 or 20 foot.Shop now
RGB Bluetooth ControllerWaterproof, 12 to 24V. Pick colors and dim from your phone.Shop now
Keep the light bar on its own switch so you can run the underbody lighting without it. Our rock light install guide covers mounting and wiring.
Calculating Your Amp Draw and Fuse Size
Every light lists its power on the product page. Add up the draw for every light you are wiring into the same circuit, including any pods or accent lights sharing the harness, and size the fuse to that total plus a small margin, not to the wire gauge alone. The Black Oak harness fuse is 10 amps on the 10 inch bars and 5 amps on the 2 inch pods. If you are stacking a bar with pods, give each light its own harness and fuse, and size the one reducer for the combined total from the table above. For the relay and switch side of the harness, see how to wire a relay for off-road LED lights and how to wire a light bar.
Golf cart light wiring FAQ and troubleshooting
Can I wire the light bar straight to any battery in the pack?
No. Taking power from one battery in a series pack drains it faster than the rest and unbalances the pack over time. It is not possible on a single lithium pack, and a 6V or 8V battery cannot supply 12V on its own. Use a voltage reducer.
Do I need a voltage reducer if my cart is 36V or 48V?
Yes. Black Oak LED lights run on 12 to 30V DC, and a 36V or 48V pack is above that range. A DC-DC reducer steps the pack down to 12V and draws from the whole pack, so the batteries stay balanced.
What size voltage reducer do I need?
Add the rated watts of every light on the circuit, divide by 12 for amps, multiply by 1.25, and round up to the next reducer size. One 100 watt double row bar works out to 10.4 amps, so a 20 amp reducer. The table above covers each light.
My lights do not turn on. What do I check first?
Check polarity at the harness, then the inline fuse, then the reducer's 12V output with a multimeter. No output means checking the reducer's input voltage and its key-on wire. Good output but a dark light means checking the harness connector and the ground.
The fuse keeps blowing. Why?
A fuse that blows at once points to a short or reversed polarity. One that blows after a few minutes points to a load bigger than the circuit, so add up the watts again. Never fit a larger fuse to stop it blowing.
The lights stay on with the key off, or the cart will not run after the install.
Lights that stay on mean the reducer is fed from the pack side of the key switch. Move its feed to the key-switched circuit or use its key-on wire. A cart that will not run usually has a tapped battery or a loose pack connection, so recheck each one.
Will a light bar make my cart street legal at night?
No. A light bar is an auxiliary light. Street-legal night driving requires headlights, tail lights, brake lights, and turn signals that meet your state's requirements, wired and aimed separately.
How far will a golf cart light bar actually throw light?
It depends on the optic (spot, flood, or combo) and the bar's size, not just lumens. A spot-heavy combo throws farthest down a straight path; a flood-heavy combo lights the width of a cart path at closer range. Match the optic to how you use the cart after dark.
Shop golf cart lights
Each product page lists exactly what is in the box. See the full golf cart LED light collection for more options, and our light bar size guide if you are weighing a 10 inch against a 20 inch bar.
10 Inch Double Row Light BarPro Series 3.0 in 3 watt and 5 watt builds. Spot, flood or combo.Shop now
10 Inch Single Row Light BarLow profile for a windshield frame. 3 watt and 5 watt builds.Shop now
2 Inch LED Pod LightCompact spot or flood pod, 20 watt or 40 watt.Shop now
Red LED Rock LightsUnderbody glow for a cart. 9 watts each.Shop nowRGB Rock LightsColor-changing underbody and wheel well lighting.Shop now
Low Pro Spreader LightFlush mount worklight for a roof or rear rack.Shop nowRGB Rock Light Kit, 8 LightsUnderbody glow in any color, Bluetooth app control.Shop nowFathom RGB Strip LightColor accent lighting, 10 or 20 foot.Shop nowRGB Bluetooth ControllerColor and dimming from your phone.Shop now
Black Oak LED lighting is military grade, IP69K rated, and designed and engineered in Sarasota, Florida. Questions on sizing a bar to your cart or wiring around a specific battery configuration: reach out and we will help you spec it out before you order.
