What lumen do you use for CVP?

Excuse me, could you elaborate on the specific context in which you're referring to "lumen" and "CVP"? As far as I'm aware, "lumen" is typically used to measure the luminous flux of a light source, while "CVP" could stand for various things depending on the industry or context. In the realm of cryptocurrency and finance, neither term is directly related to our field. However, if I were to hazard a guess, I'd assume you might be asking about the level of brightness or visibility required for some form of transaction verification or process related to a specific cryptocurrency or financial platform, abbreviated as CVP. If that's the case, could you please clarify the exact nature of CVP and the context in which you're inquiring about the use of "lumen"? Without that information, it's difficult to provide a precise answer tailored to your question.