Light fire flicker help

I have 3 sectors, one has a burning barrel with light level of 160 the second sector surrounding the first has light level 152 and the third sector which is the actual room has 144.
Now I would like to have the first two sectors have the action light fire flicker in sync with each other but only the 2nd sector actually has the effect, am I missing something here, I mean it should work.
Any help would be appreciated.

I don't know the exact specifics, but the sector flickers from it's brightness level to the lowest adjacent sector's brightness level. It sounds like the first sector (160) is surrounded by a sector with 152 brightness, so it barely flickers if at all.

I don't know if you can make them flicker in sync, since the fire flicker is random. Just get rid of the second sector altogether.

Thank you I figured it out, but in the end it just didn't look right so I just made the lighting gradient with 2 other sectors, thank you for the quick reply.