Hey Sour, I have that exact one, got it from Lowes for $10. It looked good when I bought it but now I dont use it very much. I agree that the ph feature is iffy at best. I couldnt get it to budge in my soil or the water (gauge stayed all the way to the left, ph8 ) The test kit I got says my water ph is 7. The moisture part is good for soil moisture though. As far as the lights meter...it only goes up to 2000 lumens. Our plants need much more than that and there is no way to tell if you have 2001 lumens or 10000 lumens.
I'm a first time grower but in my opinion its only good for a moisture meter.