The basic design idea for using an easily obtainable parasol / camping light. I removed the battery and switch from the unit then cut a 54mm hole, with a hole saw, carefully through the entire unit to make a central hole for the lens mount. The mounting was the 52mm adaptor for the cokin filters epoxy resin glued to the rear of the unit. Battery box was an old 4 x AA battery box from battery powered xmas lights. Wire into the unit observing polarity matches the original wiring. I mounted a hot shoe mount from an old broken flash gun to facilitate fitting on the camera hot shoe. Light from the unit is about 1200 lux at 12 inches, 33cms and gives exposures of 1/6 sec f11 at iso 400. Can be softened using a opaque plastic cover from a a4 file if needed.