Has anyone ever noticed a "darkening" to the Tritium on their watches???

[Clay]

Maybe I'm just going crazy, but yesterday I took my 1665 out of the safe...It's the first time I had taken it out since the beginning of May (So it was in the safe for 3 months)
And I could swear that the Tritium on the markers and hands was "darker" then when I put it in the safe three months ago???
Now I know there are countless theories as to what makes Tritium Patina over time, and from what I can gather the prevailing options are that a LACK of sunlight will darken the Tritium.
I have had the watch on now for a day and a half and the markers look to me to be back to where they were three months ago...???
Am I crazy???
Was it an optical illusion???
Was I so used to seeing the dial on my Luminova 16600 that the 1665 just "seemed" darker???
Or was it really darker and the sunlight lightened it back up again???
And no, there unfortunately was no time in my busy day to take any pictures, I wish I had...
Thoughts???