Too true haha, mine lights up my living room lol. It's nice when I get up in the morning and the ladies sleeping, don't gotta turn a ton of lights on.Can't see any downside to running one. Without the red glow, I'd have to get a night light for downstairs.
You do hear of people with very well established systems that don't need the nutrient uptake after the coral has taken the lead. I like it as a bellwether. It's coloration and performance can tell you as much as most canary corals.