Thanks Mike and Bruce.
To explain more, I was using two rules - DaytimeMotion and NighttimeMotion. Both just turn lights on when motion happens, and off 3 minutes later, the only difference being the colour of the bulbs.
I found that if I wanted red lighting at night (based on Mode), and it was the first time I’d triggered the lights that night (so the stored colour was white), the lights would go white for a fraction of a second, then red. It also felt like they were going bright then dim, but since Hue ramps up rather than comes on instantly it was hard to tell.
So, I changed to just one rule for “turn lights on when motion”, and then a rule that changes the bulb colour to red when the mode is “night”. Because the bulbs are already red when they come on, it doesn’t flash white.
I was just hoping to move the light brightness logic (30 at night, 85 in the day) to that same rule, to make the motion rule simpler. Not an issue though, I was just surprised that there was something it couldn’t do!
Thanks again for the quick reply.