Stupid question about Elinchrom deflectors

I have several of these that I've just started to play around with a bit. Each deflector has a shallow bowl shape, and they can be attached with either the concave part of the deflector facing towards the flashtube or away from it. The concave side appears rougher and more granulated to scatter light more randomly. The convex side is smoother. I've searched for pictures online, and I've found pictures with it mounted both ways! Maybe it actually can be mounted both ways for slightly different characteristics. I've only used it one way so far, and I'm not saying which way to avoid looking like an even bigger idiot!

So which is it? Concave side facing in or out or either way?

It would seem logical to use the deflector with the concave side away from the bulb but I'm 99.99% sure it's meant to be used with the concave side towards the bulb. And that's how I use it.

So far, so good, Leo! That's how I've been using it as well.

sdipirro wrote in post #11542104
So far, so good, Leo! That's how I've been using it as well.

LOL So that could mean that there could be two big admitted idiots in this forum. Well, you know what they say, misery loves company.

i use silver one both ways. seems to me it evens light when used with octabox (concave side from bulb)
another idiot

The Elinchrom 27" beauty dish came with a set of these (gold, silver, white, and translucent) I would think that with the beauty dish at least, They are meant to be used with the concave side towards the tube and that't how they are pictured on Elinchrom's site. But with a softbox... That's an interesting question, I am going to have to play around a little bit and try some different setups.

If the light looks good then that's how to use it.

The response I had gotten a while ago from Elinchrom was that the deflectors are designed and intended to be used with the concave side facing the flash tube. The textured (pebbled) surface faces the flash tube and helps to diffuse the light as it's reflected back to the inner surface of the modifier.