I don't feel so bad now. I picked-up another T-2 a week or two ago and I have the same issue; I have to set it on 10 to see it inside. My older T-2s are much brighter.
Something else I noticed at the 10 or above setting is "stray" red light around the outer edges of the FOV. Are you noticing this as well? If I remember, I'll snap a pic if I'm not explaining this clearly. Never had this problem with my older units.
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