Prebuilt high-power switch for Arduino

Found a pre-made Arduino-compatible MOSFET switch for $18 each. Four of these 4-channel switches will be suitable for a 16-segment Arduino scanning backlight. These can switch well over 100 watts per segment, and at frequencies up to 200,000Hz; fast and powerful enough for an ultra-bright scanning backlight utilizing ultra-short strobes.

MOSFET power switch suitable for LED ribbons, to modulate backlight segments.

A similar MOSFET switch is being used to operate LED ribbon.