TheDankness
Well-Known Member
First off, that thread is not measuring lumens but rather LUX, and here's a wikipedia quote to show the difference(Btw, pretty fucking skeptical about that guy and his Lumens, lux, and adding it all up thread. I don't know how he acheives 65000 lux from one 42 what cfl, WHICH IS ABOUT 20 TIMES A 42 WATT CFL'S INITIAL LUMEN RATING!?!?!? That would mean that that little cfl produces AT LEAST 65000 initial lumens, right? either tell me where i can get some magic cfl's too or... wtf?)CFL lumens dont "add" like HID because the intensity isn't very high. The light doesn't travel as far. A light meter only a few inches from even a larger cfl bulb shows massive falloff. hps and mh lights produce light that travels far enough to make the "adding" noticeable. If you tied two cfls together and measured the light right between them, about an inch away, you would see the lumens "add." larger cfl's do get better "range," but cost per lumen goes down considerably.
I use a mix of both. during veg i use smaller 26w bulbs above and vertically hanging between plants for maximum coverage. for flowering my scrog, i use higher wattage bulbs above the canopy because i dont need any "sidelight."
i like quotation marks today =/
READ THIS THREAD:
16k lumens HPS vs. CFL
Lux versus lumen
The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux. The same 1000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.
Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent light fixture with an output of 12000 lumens. To light a factory floor with dozens of times the area of the kitchen would require dozens of such fixtures. Thus, lighting a larger area to the same level of lux requires a greater number of lumens.
SEE, that guys measuring illuminance, not intensity. And a real experiment would be to measure the lux of a single square meter, keep adding 23 watt bulbs, and see if it ever gets over the single bulb rating of 1800 lumens(or 1800 lux as they are the same when only measuring a square meter, my understanding anyway) which it shouldn't. although, I am losing faith because this is such a source of controversy I don't even know if I'm right anymore
And, could this no longer be a topic in my thread? I need help with a plant problem and this topic seems to trump everything. Well I choose not to participate in the Lumen debate anymore, the whole argument seems to be turning into a pissing contest, and to all who agree lets move forward. Those who disagree, SAVE YOUR DRAMA FOR YOU BABIES MAMA!
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