Heise Pro Series LED Bulbs - Fits D4S, D4R

Product Overview

Refresh your D4S or D4R HID setup with the Heise Pro Series LED bulbs, model HE-D4CPRO. This off-road LED bulb set delivers 16,000 lumens per set, uses 12–24V DC power, and includes a rotatable collar for beam adjustment.

The bulbs are designed for D4S and D4R sockets. Their all-metal construction, copper core, and active cooling system support sustained operation, while the built-in EMI filter helps reduce interference with radio, GPS, and CB equipment.

Key Features & Benefits

• 16,000 lumens per set: The stated output provides bright illumination for off-road use.
• D4S and D4R fitment: One set supports either socket type, helping you match the bulb to your existing application.
• Rotatable collar: Adjust the bulb orientation to align the beam cutoff in a projector housing.
• Active cooling: An IC thermal controller and high-speed smart fan move heat away from the LED diodes.
• Built-in protection: Reverse polarity protection helps guard against incorrect wiring, and an EMI filter helps limit electronic interference.
• Wide voltage range: 12–24V DC input supports applications using either voltage.

Technical Specifications

Why Choose This Product?

The HE-D4CPRO combines a solid copper thermodynamic core with a thermal controller and smart fan. This cooling design is intended to manage heat during extended use, with an operating temperature listed at 46.1°C (115°F).

Beam alignment is another useful adjustment when fitting LED bulbs into projector housings. The collar rotates so you can set the bulb orientation and check the cutoff after installation. Instantaneous full-lumen startup means the listed output is reached immediately.

Installation & Compatibility Notes

Confirm that your vehicle uses a D4S or D4R HID socket before selecting these bulbs. Installation replaces the OEM HID bulb; in most applications, the factory ballast is bypassed or removed because these LED bulbs do not require a ballast.

After installation, adjust the rotatable collar and check the beam cutoff against a wall. Vehicles with CANBUS monitoring may require a CANBUS decoder to prevent flickering or error codes. The bulbs are intended for off-road use only.

Frequently Asked Questions

Do these bulbs fit both D4S and D4R sockets?

Yes. The HE-D4CPRO set is specified for D4S and D4R bulb fitment. Check your existing bulb or vehicle documentation to confirm the socket type.

Can I keep the factory HID ballast?

The LED bulbs do not require a ballast. In most installations, the factory HID ballast is bypassed or removed.

Will I need a CANBUS decoder?

A decoder may be needed on vehicles with CANBUS monitoring to prevent flickering or error codes.

Are these bulbs intended for road use?

No. The listed intended use is off-road only.

How do I adjust the beam after installation?

Use the rotatable collar to set the bulb orientation, then check the beam cutoff against a wall.

Explore More

Shop the Heise Pro Series LED bulbs at 12 Volt Outlet. Want to learn more about Heise? Explore our Heise brand profile.