After reviewing a range of different metering choices in actual use, I compiled a summary of findings, as well as my own personal subjective ratings of features and overall utility as a lighting professional. This chart is the collection of all findings in a simple comparison table for those who find this useful (like me):
The Meter Comparison Table in .pdf format.
Note that all of the meters tested were shown to deliver accurate results when testing LED products, as well as conventional lamps. This is not always the case. Many older meters do poorly under LED light sources, either delivering unreliable results, or unstable readings. One example of this are the obsolete Minolta meters manufacturer before LEDs had entered the market. These often deliver CCT results that are far enough off more current meters as to render them essentially useless. Also, some LED products flicker at a frequency that creates moving readings, which never stabilize enough to be readable. The meters I have that exhibit this behavior were excluded from review completely, for obvious reasons.
This is by no means a comprehensive review of all the meters available to designers and engineers. I could have scoured web sites and pulled down more data to include objectively from indirect information. However, that was not my intention, and like the results I get from testing actual products against published data, there is no substitute for directly using and testing any product. The problem for most of us is that testing every option before buying is just not possible, or practical. So, with that in mind, and reflecting the fact that I have both collected more than my share of instruments and put them to use, and have had access to others purchased for and with customers, I offer the reviews as they stand. In this, simply regurgitating what I get from web sites would only pollute the results, as anyone can do that, as that is how I came to purchase those products I have, for both good and bad results. I hope that this this is of value to those making your own decisions, hoping to avoid some of the redundant purchasing decisions I have, that has led to having this many meters collected to review.
That all said, if anyone has a meter they feel was unfairly excluded here, that would like to be added, I offer this. Send me the meter and give me a few weeks time to play with it, and put it to use in tests we are completing on a regular basis. This includes whatever software is required to create a complete picture of the product in actual use. I’ll add what I find to the meter reviews by adding an entry for the specific product, and update the summary comparison table before returning the meter – unless I find I can’t live without it and find myself compelled to add to my collection – which we can discuss at the time.