“Watermelon” describes a style of light, not one installation standard. These four United Pacific examples show why the lamp size, mounting hole, attachment method and wire functions belong in the buying decision.
Four installations to compare
| Part | Light configuration | Mounting detail | Electrical detail |
|---|---|---|---|
| United Pacific 34847 | Amber LEDs and amber polycarbonate lens; two brightness functions | 3/4-inch hole; rubber grommet and stainless bezel | 12 V; white ground, black low, red high |
| United Pacific 39231 | Amber primary and blue secondary LEDs; clear lens | 1-1/8-inch lamp size, 3/4-inch hole; threaded stud and nylon nut | 12 V; secondary colour overrides primary; secondary colour for auxiliary/off-road use only |
| United Pacific 35074 | Amber glass and amber UltraBurst 1157 LED bulb | Flush-mount kit with assembled hardware | 12 V; metal ground path, black low, green high |
| United Pacific 20479 | Dark amber glass and amber 1157 LED bulb | Flush-mount kit with gasket, screws and nuts | Metal ground path, black low, green high |
Measure the mounting point
Check the specified cutout or hole, attachment hardware and available depth behind the panel. The 39231’s lamp size and installation hole are different measurements. The 34847 and 39231 share a stated hole size but use different retention methods. A full-size flush-mount light needs its own mounting information; do not transfer either mini light’s hole size to it.
Read the wire functions for that part number
The examples use different ground paths and wire assignments. Do not carry a wire-colour assumption from one light to another. Match the manufacturer’s diagram and operating voltage to the exact part being installed. Follow its instructions for connections, protection and mounting.
Compare the featured lights
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Questions before ordering
Does dual function always mean two colours?
No. The 34847 provides two brightness functions in amber. The 39231 has amber primary and blue secondary outputs, with the manufacturer’s restriction on secondary-colour use.
Is the lens colour the same as the illuminated colour?
Check both fields. The clear-lens 39231 produces amber or blue light; a clear lens does not mean white light.
Can I reuse my existing bracket?
Compare its measured mounting point and rear clearance with the selected lamp’s instructions. Similar appearance, a shared brand or the watermelon name alone does not establish compatibility.
Browse full-size watermelon lights, then use each product’s part number and specifications for your selection.
Source: United Pacific product specifications for the four named parts, checked September 2026.
Manufacturer references: United Pacific 34847 specifications, United Pacific 39231 specifications, United Pacific 35074 specifications, United Pacific 20479 specifications, United Pacific 20479 catalog (page 33).