The bulb is a 3000K bulb and is a “Warm Glow” type that has a lower K when it is dimmed to mimic an incandescent bulb.
Yes - You can use this bulb even if the fixture is not used in conjunction with a dimmer switch
These Philips PAR30S bulbs produce 850 lumens
Any modern Leviton or Lutron brand dimmer that’s clearly marked as LED compatible will work. Though not completely linearly as an incandescent bulb will be.
CRI = 80 3000K at full Bright