Yeah, lighting makes a big difference. But the thing that matters most is that whatever is seen now, won't be the same when you start using the new painting system.
The old system, which is what treggers have, does wear. Well, I guess really any system will wear. But one thing I like about the TB, even when the key images wear off and are harder to see, is that is so much easier to find the keys you want without looking. I and others have mentioned how when using numbers or top row symbols on traditional keyboards, we didn't touch type those because they were still so much harder to hit accurately by feel if you didn't really work at it. With the TB, that isn't an issue. As a result, I can touch type much better. I only have issues now if needing to use a character I normally almost never use - like curly brackets.