2.5%...that's not so bad. Oh, wait, that must have been a floater. 25%...Ouch! That's out of range even for govt work. So, no saving that $23. But worth more than that to know the difference...Thanks for the comparison!
So, I haven't yet taken my Black Friday $80 Spyder 5 Express out of the box, and now you're saying I need to spend a c-note more first to tell me how gloriously bright is the light from my RS400? Are you sure Craig's meter isn't reading 25% low? Two other questions come to mind: 1) Is the $17 meter linear in its error, and 2) How can we get a comparison including the $40 meter?
We don't know which one is correct... I am assuming Craig's is as it is way more expensive.
Right. I've got to learn to use the emoji, as in "Are you sure Craig's meter wasn't 25% low? "
We compared Craig's meter with mine, and mine showed about 25% higher readings. It appears mine would be a good deal if you are just concerned with monitoring light loss over time where a better meter would be better to verify you have the light output you want.
Problem is, how do you know that your meter is the one that is wrong? Maybe Craig's reads 25% low. Or the real number may be somewhere in between the two.