Not a dumb question. Both OEM and Depo are glass lens however (I could be completely wrong here) OEM has additional fresnal lens built into the glass that controls the light direction. The Depo lens is clear and allows for more projection. I'm not entirely sure what LED's would look like in the OEM housing and if the light would be usable. LED bulbs are designed to mimic halogen bulbs so it "might" work.
OEM uses 9005/9006 bulbs, Depo uses H4/H1 bulbs. I personally prefer the ease of fitment of the 9005/9006.
Thank you again for the reply.
I got myself a bit mixed up and didn't realize the other poster already had the Depo housing which led me to think the H4 bulbs worked in OEM housings - hence my question about the OEM housing. I am now clear that H4 = Depo housing.
I'm not happy with the OEM headlight quality (brightness or projection) so I'll have to spring for the Depo housing and H4 bulbs.
As for the Depo corner lights, are those just aesthetic dressing, or is there a latent benefit there as well?