Fed up not having time during daylight hours to give the zed a wash I dug out my 4 portable cob led worklights and gave the zed a clean under my garage pir security light.   Just a presoak, 2bm wash and a 50:50 mix of Sonax BSD and Chemical Guys V07 sealant as a drying aid  Got a 20w rechargeable portable workload below left and 3 battery powered ones like the one on the right.     These cob LEDs are the nuts and really illuminate a wide area well.