I'm sorry for my bad English.
My Aerodrums was working fine (with some latency troubles) in a room. I'm trying to fix the latency problems in exactly the same room and I can't get a light configuration that works. I think my Aerodrums-light is damaged or faulty.
Here is an Aerodrums-light find with google image :

Here is mine (I think I’m missing a black ring around the lens but I don't know why) :

Here is a picture "inside" my Aerodrums-light (where we can see anormal reflects) :

Here is a screenshot of "the room with Aerodrums-light on" :

To compare, here is a screenshot of "the room with Aerodrums-light off" :

Any idea ?
Am I missing a black ring around the lens ?
Could someone show me a picture of his functional Aerodrums-light to compare with mine ?