Frequently Asked Questions About Mack CH/CHN/CHU Truck Cab Lights

Will these cab lights fit my specific Mack CH, CHN, or CHU model year?

Most aftermarket cab lights for Mack CH series trucks are designed to fit models from 1988 through 2007. However, there are slight variations between early models (1988-1999) and later models (2000-2007), particularly in mounting hole spacing and wiring harness connections. CHN and CHU variants share the same cab structure as the CH, so fitment is typically identical. Always verify the specific year range listed for each product, and if you have a transitional year model (1999-2000), contact us with your VIN to confirm compatibility.

Do I need to drill holes to install these cab lights, or will they use existing mounting points?

This depends on your truck's current configuration. If your Mack CH/CHN/CHU came factory-equipped with cab lights, replacement lights will typically use the existing mounting holes and wiring. For trucks without factory cab lights, you will need to drill mounting holes and run new wiring. Most aftermarket kits include drilling templates and detailed measurements. The standard spacing for Mack CH cab lights is approximately 6 inches center-to-center, with five lights total across the cab roof.

What's the difference between LED and incandescent cab lights for my Mack?

LED cab lights offer several advantages over traditional incandescent bulbs: they last 50,000+ hours compared to 2,000-5,000 hours for incandescent, draw 80% less power, and provide brighter, more consistent illumination. However, LED lights cost more upfront and may require different wiring or resistors to prevent hyperflashing. Incandescent lights are less expensive initially and work with original wiring without modifications, but require more frequent bulb replacements and generate more heat.

What style options are available, and which looks most authentic on a Mack CH?

The most common styles for Mack CH/CHN/CHU trucks are the classic round "watermelon" style and the rectangular style. Original factory Mack cab lights were typically round amber lights with chrome or black bases. Popular finish options include chrome-plated plastic, polished stainless steel, and powder-coated black. For an authentic OEM appearance, choose round amber lights with chrome bases. For a modern custom look, many drivers prefer smoked lenses with black bases or clear lenses with amber LEDs.

Are these cab lights DOT approved, and what about state inspection requirements?

Quality aftermarket cab lights should be DOT approved and stamped with the appropriate markings (SAE P2 or PC ratings). Federal regulations require amber clearance lights on trucks over 80 inches wide. Most states follow federal DOT standards, but some have additional requirements. For example, some states require all five lights to be functional, while others only require the outer two. Check your state's specific commercial vehicle lighting requirements. When purchasing, verify that the lights include DOT/SAE certification markings to ensure compliance during inspections.