new lights

[AJ_77]

I used the "one hour on, one hour off" timing, then worked up in 15-min intervals over 10 days until full-on. This caused a fair bit of bulb aging that I didn't anticipate - all the extra on-off cycles.

Others have used layers of screening over the tank, removing them one by one until all gone. Can you adjust for height with the new fixture? That would be another option, or to use in combination.