Abstract: A lamp mounting assembly for mounting a lamp, such as a LED lamp assembly, to mounting structure, such as a support bar for a prisoner screen in an emergency vehicle. The lamp mounting assembly includes a universal primary bracket that is mountable in upright and inverted positions to permit mirror image lamp mounting on opposite sides of a vehicle. The lamp mounting assembly further includes a hook bracket that is mounted to the primary bracket. The hook bracket cooperates with the primary bracket to clamp the lamp mounting assembly to the desired mounting structure. The hook bracket mounts to the primary bracket when the primary bracket is in the upright or inverted positions. The lamp mounting assembly further includes a tower bracket that is pivotally mounted to the primary bracket. The tower bracket mounts to the primary bracket when the primary bracket is in the upright or inverted positions.