That explanation is far too brief.
Is this a one-off project? What has been decided, and what do you need to decide? For example, do you need to use that light bulb? What is its current or power rating? What's the budget? When is it needed? Can you borrow stuff for it or will it be permanent? What experience do you have? There are so many questions.
Seriously, you need to tell us a whole lot more about this project.
No, this is only a part of a bigger project. the other part are good to go. i just have problem with this light dimmer part. the parts will be joined using PLC.
Basically my project is a sleep mode initiator. when a person lays on a bed, the pressure will trigger a lots of things to fit in the 'sleep mode' ie light dim, close curtain, adjust the aircond etc.
i need to buy all the parts and built it when i finished my presentation next week. no borrow. will go buy when i have a definite circuit. Budget wont be a problem. i have prepared it all.
As for the light bulb, an normal 12V, 60W will do.
but it doesn't matter really, i will buy components according to the final working(simulated) circuit. (if light bulb simulated as 100W, i will find that one)
Do you think this circuit is poor? not good to go? should i try the one with MOSFET?