question ligth bulb

I built the circuit as shown and when i use a 6v 60mA bulb it lights to full brightness instantly, when i change the bulb to a 6v 160mA it glows faintly and takes almost 30 seconds to reach full brightness....can someone shine some light on this for me please (pun intended) lol

Need help identifying this light bulb its diameter is 6mm I got three of them and they are all diffrent size of lenght.