Do parabolic reflectors in globes increase the brightness of the filament's light, or just 'spread' the light?
A "traditional" (plain) light bulb will emit light in all directions.  A reflector bulb (or a normal bulb in a reflector fixture) will direct the light in a certain direction, increasing the light intensity in that direction, while preventing light from being emitted behind the reflector.

The reflector reduces the angle (or area) illuminated by the lamp.

If a bulb is specified as 60 Watt, it will draw 60 Watts with or without a reflector.