[VHFcontesting] Contacts using "Light"

[Dustin Williams]

Ok I am not familiar with these "light" QSOs so forgive me if this is a 
stupid question.

How do you know the frequency that you  are "transmitting" on? My 
understanding is that part of what we must do as Amature Radio operators 
is to know where we are transmitting at all times and stay within our 
bands. Now if I understand this right the frequency of light varies with 
its color. So I ask again how do you know where you are both for FCC 
compliance and contest credit?

73,
Dustin
K5RNT/R