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Measuring current draw from modern LED lights.

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Clocky
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Sat Feb 29, 2020 12:45 am   



On 24/02/2020 6:37 pm, Je�us wrote:
Quote:
Greetings.

Getting to the point - is there anything about modern LED grow lights
that could cause inaccurate amperage measurements? I have an elcheapo
Arlec meter, when testing it on other devices, it's readings are
consistent with the devices stated current draw. So I assume the meter
is accurate.

However, these lights claim to have an average current draw of
393W±3%.


No they don't. Wattage is not a measure of current draw.

My meter says 765W... and I tested two identical model lights
Quote:
with the same result.

I'm no electronics expert,


Clueless more like.

but IMO either the light's stated specs are
Quote:
way off, or the light is somehow causing an inaccurate reading.

Thanks for any sensible comments.


You need to ask a sensible question first. The discrepancy is either due
to you not knowing what you are doing, a useless meter, the switch mode
power supply causing an incorrect reading or incorrect labeling.

No doubt the manufacturer will want their lights back so they can do
their own checking, most certainly if you asked them the same question.

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