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The exact "heat of evaporation" factor for delta 9 THC is 66.49 kj/mol (guy at TokeCity found it, but he didn't realize vac purgers were pulling a vacuum deeper than 1,000 microns while the two stage rotary vacuum pumps are pulling below 100 microns, often down to 25-50 microns, so he thought...

Here's a scan of my notes, if someone would like to make a nice version, please...

Here's the link to the vacuum pressure unit converter: http://www.engineeringtoolbox.com/vacuum-converter-d_460.html

I used that calculator and the results show I'd be boiling off THC way before a full vacuum just at room temperature. To use the calculator you need to know the boiling point of THC at 760mm of Hg is 157C/315F (from THC at Wiki,) also you need to CHOOSE "high molecular or high boiling point...

Thanks for the info, imho these panels should have a long life since they're not being driven extremely hard...If we're ever going find out the most efficient way to grow herb indoors it would be with the grams/KW hours figures, but it seems we're stuck with generalities like grams/watts (that's...

Looks good! I've read through several of these Lighthouse Blackstar grows, lot of BS about why 500w of leds are only drawing 300w from a 110/120V wall socket, anyone powered the panel up with 220/240V and measured the amp draw? (Volts times Amps equals Watts)