Amnesialocal Posted November 21, 2023 Share Posted November 21, 2023 Dear all, I need some advise as I guess something is not right. I bought a plug meter reading to read electricity consumption of equipment. I tested with something I know well...like the dehumidifier I have at home (156w) and other electric things more or less I know they electric consumption. And it seems working fine. I then tried the meter with the lamp ( Temporarily a 400wHPS which I use for screenprinting). I thought it would have read 440-450w ( light + ballast), BUT instead read 350w at the wall!!! This is not possible isn't? Is it defective the plug meter? Why does it work relatively fine with other equipment but not the light? I hope someone can clarify this Many thanks in advance A Link to comment Share on other sites More sharing options...
sweettooth Posted November 21, 2023 Share Posted November 21, 2023 50 watts for free!! bargain!!! 2 Link to comment Share on other sites More sharing options...
Amnesialocal Posted November 21, 2023 Author Share Posted November 21, 2023 1 hour ago, sweettooth said: 50 watts for free!! bargain!!! I would like was like this, but I don't thing so...although the bulb or the ballast is not working properly...correct? 1 Link to comment Share on other sites More sharing options...
Shumroom Posted November 21, 2023 Share Posted November 21, 2023 Sounds like the ballast is not running at full power. What make of ballast is it? Atb Link to comment Share on other sites More sharing options...
Guest Posted November 21, 2023 Share Posted November 21, 2023 How old is the HPS bulb ? Light output from HPS and MH lamps gradually declines over time. Link to comment Share on other sites More sharing options...
Amnesialocal Posted November 21, 2023 Author Share Posted November 21, 2023 The ballast is eurolux and seems old school but very resistant. Never used for other than screenprinting. Never had any issue with it. The bulb is relatively new...6-8 months but again...I am not using it normally for the use it has now...and for screen printing I used 3 time for 30-45min each for photo print. 1 Link to comment Share on other sites More sharing options...
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