That's pretty good. I use an original Luna-Pro that I modified by installing a voltage regulator and 357 silver batteries. Works PERFECT. I like it better than my 2 SBC's, because you can see the "trend" of the reading. The SBC's are null-meters that give no indication of what the light is really like. And the SBC's eat up those expensive 9 volt batteries like candy.
So far I've modified 2 of the older Luna-Pros with voltage regulators, and they are sweet. Ain't got no iphone, don't want one. I'm only interested in waiting till their stock bottoms out so I can buy a pile of it.