Agree. It's too much light. Can you control the blues intensity?
Mushrooms can position themselves. I'd put them on the bottom in shade, and just let them go where they like.
Yes, I can adjust my lighting. I currently use R420R LED 320 watt 15000K Lighting System - Maxspect.
http://www.bulkreefsupply.com/r420r-led-320watt-15000k-lighting-system-maxspect.html
I do not use a preset as I feel the lights are on for too long so I have adjusted them but perhaps not as well as I should have? That is always a possibility.