From time to time, I like to make mistakes to help remind the club of errors they should avoid. I consider it my community service to the reef club. [emoji6]
I left my right 400-watt halide on for 14 hrs last night. Luckily it's over the acros so I don't think any harm will come to anything... also the bulb is towards the end of its life span so it's only pushing 350 par at most towards the middle of the tank, whereas it was pushing 500-600 par when first installed.
The usual photo period is 6 hrs so that's quite the departure from the normal light cycle but again, I don't forsee any issues. If there were softies there, I'm pretty sure they would have melted away by now.