That TLF test of the LX1330B was only done with low CRI cool and neutral flashlights (and an incan source), my test with a wider variety of light sources showed the deviations better. A 3000K 90CRI XM-L2 source was measured 3% low by the LX1330B, A 6000K(?) XM-L2 (from SWM D40A) was measured 9% high by the LX1330B. The comparison was a Mobilux (DIN-) class A luxmeter which is the same luxmeter as the Gossen meter in the TLF test but with a higher-classed (A instead of B) sensor unit.
I have no real experience-based recommendation for a quality luxmeter. Because my financial sources for the hobby are limited, I do not have an extensive collection of high end luxmeters to test. I was lucky to purchase my Mobilux meter second-hand for 425 euro (hardly used), and I own a 160 dollar (taiwanese) Tasi meter that is also in the test in the link above, that one is not too bad. But I would love to do some comparitive testing with a calibrated Extech meter (because many people have one and it is high regarded in the US), especially to see how the optical filter is behaving (I suspect it is ok but not great), and also a good Konica-Minolta luxmeter.
Searching the internet for luxmeter tests is useles, they are not there: what I do with my hobby equipment at home is already way more extensive than anything found on the internet.