For precision installation, performance optimization, and maintenance and adjustment of your RSPA sports lights. This aiming device ensures accurate initial positioning of fixtures without guesswork, saving time and labor costs during installation. It also helps achieve uniform illuminance levels across the playing surface and maximizes the effectiveness of each fixture's light output. Use this device for re-aiming, to correct for fixture movement due to wind or settling. It is also useful for seasonal adjustments if field usage patterns change.