Moved from here.
Not to argue with you, but I find conflicting information here and there. One source says to check cya at a glance, one says to stare for several seconds.
Also, my testing kit recommended doing all testing indoors for best accuracy, but other places state we should do it outside for best results (with regards to the CYA test of course). As a newcomer it can make it difficult to sift through and determine the best procedures.
That said, y'all don't seem to mind us asking questions and looking for clarification. That is much appreciated!