...can anyone tell me what the two grey strips are for?
Im thinking they might aid grip when attaching the light to particular surfaces but I'm probably completely wrong.
They're padding for the round clips, or to avoid marking paintwork. I didn't use them because I attach my lamp with tiewraps to the rearmost crossbar of the rack, the proper space for a lamp being taken already by a BUMM Line Plus. The tiewraps makes it a permanent fitting, so that I don't have to take the lamp with me when I leave the bike.
However you attach the lamp to the bike, a tiewrap lengthwise around it between the buttons is essential to keep the cap on; lose the cap, which contains the switching, and the lamp is useless. I've lost
two, and that was back in the days when this lamp cost 55 euro, so you can imagine I learned a hard lesson.
Something I forgot to say the other day about the fantastic Cateye TL-LD1100 rear lamp: on full blink, both rows, it runs about 200 hours on a set of batteries. Ripley! Even as a steady lamp, full on, all buttons in, it runs at least 10 hours on a set of batteries.