Thanks!
Update -
red mushrooms were doing not good, as you see on the photo, and Show me your Mushrooms thread adviced to lower nitrates (were 10ppm). I moved main mushrooms rock into another tank, with zero nitrates, sunlit (direct light from the southern window) and 27W 6500K daylight spiral screw-in bulb. Guess what - they opened almost immediately to a double size, see first attachment.
The second shows positive phototropism (as sunflower), when lights were off and only distant lamp gave some weak light.
Who could know that red mushrooms have medium, not the low light requirements?
