I saw a video a while back and It showed the outside lighting going from black (around midnightish to 4 a.m.) to an orangish light that looked like a sunrise before becoming completely daylight outside! The same thing also happened in the evening hours during sunset! I know this is a mod but I do not know where to find it, I have downloaded mods that look like it but nothing has happened! Can someone help me find this mod I need to have it!

you might try asking the video maker.
if you are unable to contact him/her or if he/she is unable to help, probably do an internet search.

Could this be what your looking for? http://nimi4.livejournal.com/49332.html

Or maybe this? http://modthesims.info/d/187229

Sounds more like a lighting mod to me, perhaps Gunmod's Radiance. http://modthesims.info/d/290746

It could be spookymuffin's mod.
http://www.digitalperversion.net/ga...hp?topic=7999.0

I think I had Spookymuffin's mod at one point, but switched it out for Gunmod's version since it had a lot more going for it. I do recommend the radiance system - it makes lights look very nice, not just at dawn/dusk.

I tried radiance but when I put it in the game nothing happened! How do I set it up? It is quite confusing!

You shouldn't have to set it up, just let time pass. When it gets to 6pm on lot, you should see the sunset colouring and 6am for the sunrise

The radiance mod has a special installation process, it's not enough to just put the files in the Downloads folder (they won't do anything if put there). Make sure to read the instructions.