^^^
Seriously, why doesn’t this forum have some sort of “like” button? :lol:
Anyways, the only scientific application I’ve used :lambda: for recently was for wavelength when working with sound/light… maybe that’s it? 
Glad I got it before actually trying to answer.
…
There is a concrete objective in mind; the reason I have given several hints is because I am forbidden from saying anything explicit. Abandoning an interest in this is your choice to make, but I don’t want you to ignore me as a result of Pyro’s jest.
I have an unusual reputation here.
Oops. My bad… but, it’s not FALSE, lambda is used to represent wavelength, weather you like it or not. 
Is it related to Poisson distribution? I believe that the equation is actually present in Half-Life on one of the chalkboards.
Klein-Gordon equation? Just throwing that out there because it was all I could find tangentially related to Half Life.
So…I’m assuming we won?
It is false as it does not explicitly represent wavelength. 
?
That does seem rather explicit to me.
Do you mean exclusively? Most symbols out there hardly ever represent only one single phenomenon.
Oh, right… godammit brian.
Lambdas can explicitly represent wavelength, but the Half-Life lambda does not explicitly represent wavelength. There is no direct correlation between Half-Life and wavelengths (…at least until Blue Shift was made).
Lambdas are routinely chosen to represent lengths of some kind, as a Greek-letter alternative to lowercase ℓ[/SIZE]…which finds other uses.
Unfortunately, not yet, so I continue to drop hints.
Was that supposed to open a Wikipedia article? And if so, what exactly is it that we’re looking at, the revision history on the letter L?
Ok, so it’s the distance that a molecule travels between collisions, the mean free path. Is that the connection? That mean free path sorta sounds like Freeman’s path or something? I dunno it’s too late for me to think any harder about this.
Yay, Orpheon to the rescue!
The lambda is used to represent mean free path in… certain circles (example here) which best overlap with the setting of Half-Life.