PAL Lighting
PAL Lighting Multi Color Replacement Lamp for 2T4 and 2L4 Series Light | 42-4WLCU
PAL Lighting Multi Color Replacement Lamp for 2T4 and 2L4 Series Light | 42-4WLCU
PAL Lighting Multi-Color Replacement Lamp | 42-4WLCU
Restore the color lighting in compatible PAL Treo 2T4 and 2L4 pool and spa lights with the genuine PAL Lighting 42-4WLCU multi-color replacement lamp. Designed specifically for the LAU-4C 4-wire lamp configuration, this OEM replacement allows compatible fixtures to be serviced without replacing the entire light assembly.
OEM Replacement for PAL Treo 4-Wire Lighting
The PAL Lighting 42-4WLCU is a genuine replacement lamp designed for select PAL Treo pool and spa lighting systems. It replaces the internal multi-color lamp assembly in compatible 2T4 and 2L4 fixtures equipped with the LAU-4C style lamp.
For existing installations where the fixture body, cable and control system remain serviceable, replacing the lamp can provide a more targeted repair than replacing the entire underwater light.
Specifications
| Manufacturer | PAL Lighting |
| Manufacturer Part Number | 42-4WLCU |
| Product Type | Replacement multi-color LED lamp |
| Lamp Configuration | LAU-4C |
| Wiring Family | PAL 4-wire lighting |
| Compatible Fixture Family | PAL Treo 2T4 / 2L4 |
| Light Type | Multi-color |
| Application | Pool and spa lighting replacement |
Compatibility & Fitment
PAL identifies the 42-4WLCU specifically for:
- PAL Treo 2T4 lighting systems
- PAL Treo 2L4 lighting systems
- LAU-4C replacement lamp applications
- Compatible PAL 4-wire lighting installations
Verify the identification of the existing lamp before ordering. PAL manufactures more than one four-wire replacement lamp configuration, and similar-looking lamps may not be electrically or operationally interchangeable.
LAU-4C vs. LAU-4D: Which Lamp Do I Need?
PAL lists the LAU-4C and LAU-4D as separate replacement lamp configurations. They should not be treated as interchangeable simply because both belong to PAL's four-wire lighting family.
| LAU-4C | 42-4WLCU |
| LAU-4D | 42-4WLDU |
If the existing light or lamp is marked LAU-4C, the 42-4WLCU is the appropriate PAL replacement lamp.
If the existing lamp is marked LAU-4D, use the appropriate LAU-4D replacement instead.
Replacing an Older PAL / Powerite LAU-4 Lamp
Some older PAL and Powerite lighting installations may have lamps marked simply LAU-4 rather than clearly identifying a later LAU-4C or LAU-4D designation.
Because PAL has produced multiple four-wire lamp versions, an older LAU-4 marking alone should not be used as the only compatibility check. The existing lamp, fixture and lighting controller should be identified before ordering.
If your existing lamp is marked only "LAU-4 POWERITE," we recommend confirming the original fixture and controller configuration before purchasing a replacement lamp.
How to Identify the Correct Replacement
Before ordering a replacement PAL lamp, check the existing equipment for identifying information. Useful information includes:
- Part number molded or printed on the existing lamp
- LAU-4C, LAU-4D or other lamp designation
- Treo fixture model number
- Lighting controller or transformer model
- Number and arrangement of electrical connections
- Photos of both the front and rear of the existing lamp
Confirming these details before purchase helps prevent ordering a physically similar but incompatible lamp.
Installation & Replacement Guidance
The 42-4WLCU is intended as a service replacement component within a compatible PAL Treo light. Installation should follow PAL Lighting service and installation procedures for the applicable fixture.
Disconnect electrical power to the pool lighting system before servicing. Underwater lighting equipment must be installed and serviced in accordance with the manufacturer's instructions and applicable electrical and pool safety codes. If you are not experienced with underwater pool lighting, installation should be performed by a qualified pool or electrical professional.
Frequently Asked Questions
PAL identifies 42-4WLCU as the multi-color replacement lamp for compatible Treo 2T4 and 2L4 fixtures using the LAU-4C configuration.
No. The 42-4WLCU is a replacement lamp component for a compatible existing PAL light assembly. It is not a complete new fixture with cable and wall fitting.
Yes. PAL identifies this part as a multi-color replacement lamp.
Yes, when the existing 2T4 fixture uses the compatible LAU-4C lamp configuration.
Yes. PAL specifically lists the 2L4 among the applications for the LAU-4C 42-4WLCU replacement lamp.
No. PAL identifies 42-4WLCU for LAU-4C applications and 42-4WLDU for LAU-4D applications. They should not be assumed interchangeable.
Possibly, depending on the original PAL or Powerite system, but an LAU-4 marking by itself is not enough to guarantee compatibility. Older systems should be identified by fixture and controller model before ordering.
The most useful information is the model number of the existing fixture or controller along with clear photos of the front and rear of the original lamp.
Why Use the Correct PAL Replacement Lamp?
Pool and spa LED lighting systems rely on the correct lamp, driver and control configuration to produce proper color operation. Using the correct PAL replacement part helps maintain the electrical and control relationship intended for the original lighting system.
Because multiple generations of PAL four-wire lighting exist, matching the exact lamp configuration is especially important when servicing older Treo or Powerite installations.
Not Sure Which PAL Lamp You Have?
If your existing lamp is marked LAU-4, LAU-4C, LAU-4D or has an older Powerite marking, Aqua Terra Backyard can help identify the correct replacement. Send us the model information from your existing light or controller along with clear photos of the front and rear of the lamp before ordering.
