Quote Originally Posted by oldquack
And don't feel stupid about not knowing about "high heat spectral range" that was a new one to me, I feel stupid too.

Yo' irydyum,

You can't go questioning FreeDaTerd's experience, didn't you hear that he's a genius who's just here to help us all. Never mind what your observations are, how the heck could they be right, he's knows it all and then some.

I love this gem, "the higher the Kelvin, the "hotter" the light."-FreeDaTerd

Gentlemen we are truly in the company of greatness. He has the ability to turn color tempertures into thermal tempertures. I am humbled.
Ok oldmac your first post in this thread.....clearly saying this is untrue.

NOW,

Quote Originally Posted by oldcrack
The thing I really find really annoying about people like you is thier inability to accept when someone is actually agreeing with thier facts but try to point out there are other factors to consider before drawing conclusions.

At no time do I dispute the physics of light. Listen carefully; I beleive you are right about light energy, various wavelenghts have more energy then others.
I don't think you even know what you post half the time, you have zero consistency my friend. I don't think you can remember maybe?

Quote Originally Posted by oldman
In the case of MH vs HPS you are overlooking one very important item, MH coverts electrical energy into light energy less efficently then HPS. We see it when we compare lumens/watt of each. The "lost" lumens are not wasted in an inefficent ballast but in the inefficent bulb....as extra heat. Some of this extra heat is in the form of some "non-visable" light like IR and UV, but the MH bulb's glass envelope will be considerably hotter then the HPS.
We all agree the spectrum of the MH light is hotter kelvin wise and photon energy wise. Now, the HPS bulb makes WAY more total light & IR light than the MH bulb and that is very hot because of it's wavelength and properties similiar to a microwave (the IR). I am no light expert by any means but I can do simple math and have ran both types before. My reference point has always been an HPS hortilux bulb and I will bet you money that a 1000 watt HPS hortilux produces more total heat than the 1000 watt MH bulb in equal conditions. Obviously, they are both hot as hell, and really for a specific answer as to which one is actually hotter (not that it matters really anymore) we would have to test specific bulbs in equal set-ups. Bottom line is HID is much hotter than other light sources no doubt. Your examples of fluoro tubes don't really fit into this equation anymore than LED lights do.

All that being said, I'm glad that NOW you understand different light spectrums carry different total energy amounts that account for the temperature differences. i.e. = "high heat spectral range" :thumbsup: :jointsmile:
FreeDaHerb Reviewed by FreeDaHerb on . 3 Top Grow Tents Tested Out. Heres the Results! I have had the pleasure to test out 3 different grow tents for various operations. We have the Homebox XS, GrowLab 80 and Secret Jardin DR80. I have read various sites of people claiming which they feel is best, but never heard anything about people testing more then one. I have always used a Homebox as you can tell from my other grows. I feel that was always my standard for grow tents. For starters the Homebox I have has the white interior, 3 4" ports and the flaps. After one year of Rating: 5