user42580: I am working with the project controlling an 25W 12V Car lamp. I have a 12V car battery. I want to control it with the Arduino using a relay or MOSFET.
Any suggestion for my project would be appreciated.

user40579: You can use a RFP30N06LE mosfet. It can support up to 60V 30A
Here is a wiring schema


42580: <p>I am working with the project controlling an 25W 12V Car lamp. I have a 12V car battery. I want to control it with the Arduino using a relay or MOSFET.</p>

<p>Any suggestion for my project would be appreciated.</p>
 40579: <p>You can use a <a href="https://www.sparkfun.com/datasheets/Components/General/RFP30N06LE.pdf" rel="nofollow noreferrer">RFP30N06LE</a> mosfet. It can support up to 60V 30A</p>

<p>Here is a wiring schema
<img src="https://i.stack.imgur.com/7WxDh.png" width="500"></p>
