This is a tutorial is a comparison of using 2 lights or 3 lights with a light cube if you want to know about exposure compensation see this video https://www.youtube.com/watch?v=TM4zca0NH9M For more product photography techniques see this video https://www.youtube.com/watch?v=7tBTY2PGVvs The product is available in the UK and Europe in our product photography category. http://www.smick.co.uk/sonline/product-photography.html