Wifi Extender or 2nd AP?

I have about 25 bulbs in my apartment. I suspect I am hitting the limits of how many clients I can have connected to my wifi. Also the signal is a bit weak at one end of the apartment.

Which would be better for lifx? Adding a wifi extender, or adding a 2nd wifi router? Should I split the bulbs between two routers? Is there any drawback to having your bulbs on two different wifi networks?

Any tips would be appreciated,

Thanks in advance

Second AP in general, and extender will zap your speed.

I have eero with 2 beacons in my apartment works flawlessly.