On Sat, 24 Nov 2012 15:43:16 +0000 (UTC), DerbyDad03
wrote:

I have a porch lamp that is mounted in what appears to be a simple
ceiling fixture. The lamp goes ON/OFF with a switch, but if left on it
will turn off in a couple of hours. The timer isn't in the switch or the
bulb and I didn't see it in the fixture. How can I modify the lamp so it
stays on until I turn it off?

Thanks!

Timer might be in basement (or other location) next to the breaker box.
That's common placement.