Thank you! I really enjoy such a cloud cover. My friend told me he saw green laser reflections over the town from 2,5km distance in straight line! It must be fantastic view but I wasn't encourage enough to give somebody my laser and to tell him go far and shine it over the sky. You never know if this was seen by too much people you want and if they enjoyed it like you. And it would be better to have a diffraction grating with Batman logo rather then writing it on the sky with single beam and revealing it on long exposure photos.
I bought it from DJNY. I made some changes to the optics and electrical path so it has a bit more power. It's hard to determine height of that cloud cover but it was low and solid... maybe 100-200m. It's low stratus cover from moist advection right after warm front in the warm section of barometric low. Common situation if you live in moderate, oceanic climate. Maybe I'll grab some good 635 and 445nm lasers in the future but I don't want to spend too much on lasers becouse it's too addicting.