brilliance

Hey all. I was in Halfrauds the other day and I see that they are doing the above bulbs for £25 bogof, not bad I thought (http://www.priracing.com/product.php/5/1/piaa-h7-xtreme-white-plus-bulbs--pair-). They claim 90% more light over a standard H7 on a MK1 Leon but I wonder, has anyone tried...