Quote:
Originally Posted by fkshiu
Were you using a lux meter or a PAR meter for your readings? Sanjay Joshi's test show a PAR reduction of around 10-20% with a pane of tempered glass that is used for DE MH bulbs.
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I am not quite sure what meter we were using, kwirky would know. For the glass we tested it was not tempered and we were testing t5's.
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