Directional vs Spot Lights on iPhone

In my game I started out using Directional lights. I decided to try and replace them with spot lights for a different effect. I positioned the spot lights where i want them and things look good when running in the game view. When I build and run on my iPhone 3GS it seems like the spot lights are not working as everything is very dark?

Am I doing something incorrect?

The iPhone only supports vertex shaders (not pixel shaders), which is probably why it looks different.

You'll likely want to set the editor to use iPhone shader emulation, so you don't get different results in the editor vs. the iPhone itself.