Proof through experience, yes.
Our company site is at www.tru3d.com
We have shipped over 600 XpanD glasses plus many other types of 3D glasses. We have had many customers that thought something was wrong with one of their other devices or glasses while experiencing a green-ish tint on their picture. Additionally, we have a local service center that performs HDTV repair here in St. Pete that technically acknowledges and resolves the issue with lamp replacements.
Without in-person testing, it is impossible to say for sure, but I would put a 90% probability that a simple bulb replacement will resolve the issue.
I do not work for sears, lol, simply have a few customers that have preventative maintenance plans on their DLPs and really appreciate their annual checkups that keep their TVs running up to par. Not knowing where you purchased your HDTV, the sears mention was only a suggestion.
Generally speaking, lamp replacements are about $125 for the bulb and $100-$240 for the labor depending upon if they come on site to do it. If you are tech savvy, you could do it yourself and service guides can be easily sought after. It may be a good suggestion to just take digital pictures at each dis-assembly step so that you know you to re-assemble your TV!
Can anyone else help validate this assessment for us?