Going to open up my light ,it has died. A look on the web and the 1st ones had a water ingress problem. Had a fogged lens last year, drilling a small hole and sitting on a radiator fixed it, now its well and truly dead. A post on the web says that the lens ring is bonded in with a high strength locktight. Going to try heat with a hairdryer or stick it in the oven to break the seal, its probably one of the first batch, 2011 ones had this fault.