Out of curiosity I just did a quick par test on these two ballasts using a 250watt Radium. Both ballasts are new with adjustable settings and were placed on the 250watt super lumens setting. I was surprised to see that the 400 watt ballast put out on average about 25 more par than the 250watt ballast on the same setting. Has anyone else seen this difference? What might be the cause?
Thanks.
On a side note I also compared it to a Hamilton 250watt m80 ballast. Sensor was not moved and remained in the same exact location for each reading. Bulb was left running for 15 min. to get to full power before reading was taken.
Here are the comparisons:
M80 - 210 par
400watt electronic - 185 par
250watt electronic - 160 par
Thanks.
On a side note I also compared it to a Hamilton 250watt m80 ballast. Sensor was not moved and remained in the same exact location for each reading. Bulb was left running for 15 min. to get to full power before reading was taken.
Here are the comparisons:
M80 - 210 par
400watt electronic - 185 par
250watt electronic - 160 par
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