Light meter recommendations

[derv88]

Does anyone have recommendations for a solid and accurate light meter for indoor growing under lights?

I've screwed around with iPhone apps and I am just not trusting the readings I get. For example, I thought I had finally found a decent app that is made for this purpose called "Green Thumb(s)" or similar, I was excited when I first took measurements sometime in August that my Catt shelf lighting was putting out around 2500 fcs - right where it should be - and my Phal/Paph shelf was around 1500 fcs also within the target range.

Figuring the bulbs may be aging, and to get a more recent reading - I remeasured today and the readings were dramatically different - around 1500 fcs for the Catt shelf and less than 1000 fcs for the Phal shelf.

If these new readings are right, my 4" T5HOs are wearing out quickly...I just don't trust these readings and need accurate measurements to ensure that my light output is within range.

Does anybody have any suggestions for an accurate light meter that measures in fc's and won't break the bank?

Thank you in advance!