Turn light off after cumulative time over day?

[radiocolin (Colin Weir)]

I have an outlet controller that’s running some plant-growing LEDs (no, it’s not that fun, it’s just some garden herbs on my counter).

The lights are an obnoxious red/purple combo, so I only have it run when I’m out. What I’d like to do is turn them off after 12 cumulative hours in a single day. So if I go out, they come on for 6 hours, I come home and they turn off, and then I go out for 8 hours, I’d like them to turn off after 12 total hours.

I’m open to smart apps or webCoRE solutions.

[eibyer]

See if this will work for you. It needs to be edited for the amount of time you want, I used minutes for testing to see if it will function correctly.