Transition glasses and checking bulb brightness

Hi Friends,

So, what does the title of this thread mean?

Well, I was checking up on the lighting on my 1985 pop up for a camping trip.  Trailer hadn't been used in a while and I wanted to make sure the lights were working. In the past, a thump was needed to get a few working, but yesterday I wanted to avoid the thump, so I went through checking contacts and bulbs. Just better this way. 

The tail lights appeared dim, I thought.  I have never had a grounding problem with this trailer.  I take off the lenses to check for dirty bulbs or dirt inside the lenses.  Nope.  Not that.  I open up both tail lights to check to see if each of the bulbs have the same brightness.  I even swapped out with a new bulb.  No change. (scratches head) Hmmmmm?  It must be that it's in the brightness of the day. 

So I thought.

Get home do the honey this is what I did on my trailer thing and it dawns on me - I had been wearing my glasses which transition automatically to dark in sunlight.  (smacks palm to forehead)  The tail light bulb brightness was muted due to my tinted glasses.

I will go back today and double check sans my glasses.


Cheers,

Rod