Are HLG test results wrong? HLG 350R led grow light PAR test

horticultureli...
Independent test of the HLG 350R (integrated sphere test): cdn.shopify.co...
I test the HLG 350R and compare my test results to HLGs independent integrated sphere test and they are not the same. Which test is accurate?
#hlg
#growlight
#migrolight
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