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H4 100/80W High Wattage Bulb, 12V

Q: Has anyone tried this bulb on an BMW G650GS? I am a bit concerned it might fry the wires, reflector or lens.

You MUST use 12g stranded wire with quality insulation to each h4 socket terminal. You MUST use Ceramic High Heat HD socket. You Must usea relay that is 20% Higher rated than the max amp draw. Your altenator or generator must have the added capacity so to cover the increased draw@ idle of these lamps or they will draw down the battery. If smaller wire or alt capacity there will be voltage drop which increases amp and thus heat. For 1 light on a bike figure for 13.5v to be safe which adds to 9.6 amps. Use a 15 amp relay. For high low you need 2 relays use two 15a or 1 15a hi and 1 10a lo. If its 2 for a dual lamp or 4wheel vehicle double Watt so 260w÷13.5=17a. Best use 25 or 30a relay for high and low. Ideally use a dual output relay so 1 12g lead to each bulb from relay term not daisy chained. Ideally run 10g from battery or alt post to relay input. Built like this you will never have a capacity or heat issue when in good condition. YOU CAN NOT USE ANY STOCK WIRING HARNESS!! NOT EVEN MOST PREBUILT HD WIRING HARNESS. If you follow the above general guide with properly crimped connectors it will not only not burn up but 2 Will have much higher light output. Remember a 5% drop in voltage = a 15% drop in light output 1:3 ratio. Ideal voltage is 14.5V on 12v systems.

Q: I have an original stock headlight. Anything special i need to do to use this bulb?

The current draw with this bulb is more than stock so after having the lights on for say a 30 minute drive in warm weather see if the connector at the bulb is hot as well as the wires going to it with the lights still on if so you should install a hevi-duty connector and wire kit. My jeep 2005 wrangler handled these bulbs just fine and I think most vehicles will need nothing.....DBW

Q: I have a 1998 Kawasaki Vulcan 800 Classic. Any need to upgrade anything electrical or does this simply replace the stock bulb? Thanks

Oh yeah. You should not just plug this in and go. These bulbs make a ton more heat than a stock 55/60 bulb. Buy a ceramic plug as well, otherwise the stock pug will just melt over time. I think I paid maybe 12 bucks for 2 ceramic H4 plugs on Amazon.

Q: Will these work on my motorcycle? it's a 2004 bmw r1150r, and h4 is stamped on the glass plate of the light housing

The h4 bulb will fit, May want to check the wattage they get kind of hot. There is a lower watt bulb too I believe.

Product ID: 1185379

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Details

Brand
Hella
Light Source Type
LED
Specific Uses For Product
Headlight
Brightness
100 lumen
Wattage
80

⚡12V optimized power

💡100W high brightness

🚜Built for rugged off-road use

Frequently Bought Together

Hella H4 100/80W High Wattage Bulb, 12V

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HELLA 003427811 Hlmp Kit 190X132Mm H4 12V Ece, Multi

Description

💡 Light up your off-road adventures like a pro!

PRECISION VEHICLE FIT - Vehicle-specific fit ensures seamless installation and optimal performance without compromise.
RUGGED OFF ROAD READY - Designed specifically for professionals in agriculture, forestry, and construction demanding reliable lighting.
WARNING FOR POWER USERS - High wattage means serious light output—use responsibly to avoid wiring damage and keep your ride safe.
TRUSTED BRAND RELIABILITY - HELLA’s rigorous testing guarantees durability and consistent performance under extreme conditions.
UNMATCHED BRIGHTNESS BOOST - 100 lumens of powerful illumination for ultimate visibility in challenging environments.

The H4 100/80W High Wattage Bulb by HELLA delivers 100 lumens of bright, reliable light at 12 volts, engineered for professionals who demand superior illumination in off-road, agricultural, forestry, and construction settings. With a vehicle-specific fit and rigorous quality testing, this bulb ensures durability and performance, though users should note the increased power requires careful installation to avoid wiring damage.

Specifications

Brand	Hella
Specific Uses For Product	Headlight
Brightness	100 lumen
Item Package Quantity	1
Color	Multi
Fit Type	Vehicle Specific Fit
Auto Part Position	Rear
Light Output Maximum	100 Lumens
Manufacturer	Hella
Automotive Fit Type	Vehicle Specific Fit
OEM Part Number	H4 100/80W
UPC	760687781592 760687143574
Global Trade Identification Number	00760687143574, 00760687781592
Model	bulb
Item Weight	0.317 ounces
Product Dimensions	3 x 2 x 2 inches
Item model number	H4 100/80W
Is Discontinued By Manufacturer	No
Exterior	Machined
Manufacturer Part Number	H4 100/80W
Special Features	Puddle Lamp
Mirror Lighting Type	automotive-exterior-headlight-bulbs
Voltage	12 Volts

Have a Question? See What Others Asked

Has anyone tried this bulb on an BMW G650GS? I am a bit concerned it might fry the wires, reflector or lens.

I have an original stock headlight. Anything special i need to do to use this bulb?

I have a 1998 Kawasaki Vulcan 800 Classic. Any need to upgrade anything electrical or does this simply replace the stock bulb? Thanks

Will these work on my motorcycle? it's a 2004 bmw r1150r, and h4 is stamped on the glass plate of the light housing

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