The offending IR signals are single commands, not sequences. Delays don't apply here. When I hit Temp+, my lights turn purple. When I hit Temp-, my lights turn sea foam green. The power on/off signal makes the lights turn light blue. One of the buttons makes my lights power off, and another makes them strobe. Fun!
The remote is a Harmony One, but these color changes occur with the Kenmore (rebranded Frigidaire) OEM remote as well. It might also be important to note that I'm using the classic Harmony software, not the more modern MyHarmony software. The classic just works better for most things, although it doesn't offer power off sequence customization.
In any case, I already have a plan. I'm rearranging the device power on sequence, and I'll just cross my fingers and see whether the changes I made also make the lights power off before the A/C. When I get home I'll update the programming on the remote and see how it works. If it doesn't, I've also read that I can contact Logitech's support staff and have them rearrange the order the devices power off. If all else fails, I could change the power on button for my LED lights to be multiple keys (power on, then favorite color).
Or I could take my A/C back and pick up a
similar Haier for the same price from a different store -- just not one of the Serenity series. Amazon reviews are poorer for those, though -- some saying it's louder than other A/C units.