Bedtime - are we setting ourselves up for failure?

My daughter is 4. She usually doesn't nap during the day. Bedtime is 7pm.We'll do our bedtime routine every night but then she often complains she's not tired. If she's not tired, we'll let her play quietly in her room. This is usually colouring/drawing. She can play in there for quite a while until she lets us know she wants to be tucked in. Last night it was 9pm when she fell asleep. More often it's closer to 8pm.Experiences with this kind of routine? Should we be more strict about being in bed? Previously we insisted she stay in bed and honestly it didn't get her to fall asleep any earlier. Battles over it sometimes lasted over an hour and even two hours on occasion. This seems to result in happier bedtimes for all, just concerned that there may be a downside later.Summer complicates it a bit as well, as it is still light out at 9pm here. via /r/Parenting https://ift.tt/2X88vdX