I have recently installed two of these and their 30W big brother and can recommend them. My reasons for choosing is they are completely waterproof IP65, they come with a short length of cable attached with waterproof gland so no worrying about making a waterproof connection hanging off a ladder. The cable entry is in the bottom edge and as I wanted them to be nearer horizontal than vertical means added protection from ingress. If like me you want to have them pointed downwards then I suggest you use a separate PIR, the ones that come with an attached PIR are often difficult to angle either the lamp or the PIR.

Richard