2000 EJ257 Swapped RS
So you made the time delay longer for your circuit? Looks like it will work well. Only difference I would think would be current draw LED vs. key ring light. But im sure it is low on a key ring light too. The first circuit you posted is for interior lights which will draw more current than the small key ring light. That is why they use a power transistor to supply the lights. Only suggestion i have is to check the datasheet on the transistor you chose make sure its good for the current you need (I'm sure it is). You dont have it labeled in your rough sketch so im just curious but looks good. What IC is that?