T5 much brighter than metal halide?

[campaign000]

Download a luxmeter app, and here is the result:
2×39w 15000k T5, 250k lux
250w 14000k HM, 25k lux
Tenfold[emoji33]
Anyone knows?

 

[nautical_nathaniel]

Might be a read error from the meter or my other guess is the MH bulb is super old.

 

[campaign000]

Might be a read error from the meter or my other guess is the MH bulb is super old.

The luxmeter app might be inaccurate but enough for comparison test.
I tested several T5s and MHs and the results were similar：15000k T5 is mucher brighter than 14000k MH.

 

[campaign000]

Might be a read error from the meter or my other guess is the MH bulb is super old.

The luxmeter app might be inaccurate but enough for comparison test.
I tested several T5s and MHs and the results were similar：15000k T5 is mucher brighter than 14000k MH.

 

[DSC reef]

Bump for lighting gurus out there. This is interesting.

 

[campaign000]

Bump for lighting gurus out there. This is interesting.

I'm surprised about the results as well. So wonder anyone did the same test or any guru could confirm it.