Switching Lights to Save electricity?

PAR and lumens somewhat overlap... However, a very high lumen output could have a very low PAR output(LPS, for instance), and vice versa. However, HPS, CMH, LEDs, and fluoros do both of these.

You say lumens are for humans. I say if lumens matter so much, go pick up an LPS and make a grow journal.

As for light comparisons: http://www.fb.u-tokai.ac.jp/WWW/hoshi/env/light.html

I have attached a fairly extensive comparion table using the site and have attached it. As you can see, using identical Wm^-2, the lux required to attain comparable PAR flux density is far less for plant-specific fluoros than anything else. While more conventional fluoros score similarly to HPS, while MH is in between.

Thank you a tonne.. I love data..
Whats your educational background anyways?? My masters is in condensed matter.. I'm assuming you have some university physics, if not I'm impressed that your knowledge is more complete than most ppl gather from the net.. That became clear in later posts..

As a noob i would just use the 400watt or if ya hell bent on saving like $20 use your 250watt get some good light reflection on the go (150watt more ya really gotta be a tight arse lmfao). Cfls have there place on small plants / clones and working in tight spaces, there just to much fuk'n about to get results, if ya got all the time in the world to move the pricks about fine but most people who arn't obsessed with gardening don't have time to piss fuk about. From what ive read from many forums is a 600watt hps will eat the eqiv of clfs for dead in flowering, have seen some great results for veg but ill take the mh for ease anyday. I have respect for you cfl's but lol i dont think ya need to jump in every hid post to express your lov 4 them

If you wanna save power here are some tips, theres a post i read a while back witch has a ton.

* turn down your hotwater system if elec as most are set way to high
* replace incedecent light with 15watt ect clf
* Turns lighgt off when not using them
* use door snakes if using electric heating to save heaing expense
* tint windows or get blinds to save on cooling
*turn tv's and computers off when not being used

do a few of these and you could probably run a 600watt piss easy lol, the saving add up fast and the more you keep at it the more money you will save.

Living alone in an appt, I used to keep my hotwater off until I got up, then turn on only the top 3kW burner.. I'd chill for 40minutes or so drinking coffee etc then I had enough hot water to shower, and a bit left over for dishes etc.. Typical usage, my hotwater would consume about 9kWh/day, but doing that I knocked it down to two
Then again, it doesn't really matter if yours is gas powered..
I also unplugged my appt fridge and used a beer fridge instead..

born2killspam said:

Thank you a tonne.. I love data..
Whats your educational background anyways?? My masters is in condensed matter.. I'm assuming you have some university physics, if not I'm impressed that your knowledge is more complete than most ppl gather from the net.. That became clear in later posts..

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I'm a high school graduate.

You should veg with some t5's and flower with whatever hps accommodates your space.

Most ppl who teach themselves physics for the sake of interest memerize more than they understand..

Also, your math is wrong, lumen(s) would cancel, leaving you PAR/W

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And the math wasn't wrong, just misleading without better math scripting.. I tried to outline that with the plural lumens but that didn't help.. Its not only the units in the equation, but the magnitudes too..
I tried to express xPAR/lm * ylm/Watt = xy/Watt which would be nonsensical.. And When I say lumens are for humans, I'm bitching at all the ppl on these forums that say that is the value that matters.. We're in total agreement on that.. One thing I know is that if your data is correct, bulb specs are not!! (Not that I'm too surprised there.. I'm going to pull out my spectroscope [made from an old dvd&case, I have blueprints btw] and see if I even get massive peaks where my various bulb specs say I should be).. I wish we all discussed this the way they do in your link.. Well the only thing I criticize about their units is why in the hell would you say µMol, when you could use µEinstein?? Thats like using 'chick pea' (as decent as that name is) when you can say 'garbonzo bean' ..

You should veg with some t5's and flower with whatever hps accommodates your space.
__________________
I'm tired of being nice, so now i choose sarcasm.

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Whats so sarcastic about that?? That would be a good setup..

born2killspam said:

Most ppl who teach themselves physics for the sake of interest memerize more than they understand.. And the math wasn't wrong, just misleading without better math scripting.. I tried to outline that with the plural lumens but that didn't help.. Its not only the units in the equation, but the magnitudes too..
I tried to express xPAR/lm * ylm/Watt = xy/Watt which would be nonsensical.. And When I say lumens are for humans, I'm bitching at all the ppl on these forums that say that is the value that matters.. We're in total agreement on that.. One thing I know is that if your data is correct, bulb specs are not!! (Not that I'm too surprised there.. I'm going to pull out my spectroscope [made from an old dvd&case, I have blueprints btw] and see if I even get massive peaks where my various bulb specs say I should be).. I wish we all discussed this the way they do in your link.. Well the only thing I criticize about their units is why in the hell would you say µMol, when you could use µEinstein?? Thats like using 'chick pea' (as decent as that name is) when you can say 'garbonzo bean' ..

Click to expand...

They're not totally off. They're probably dead-set on a single bulb type. So really, lumen rating is directly correlated to the PPFD conversion factor for their purposes.

I'm not so good at memorization(I'm awful at Jeopardy). If it's not useful to me... I probably do not waste precious memory on it.

Now then, if you presented a problem to me, I could rapidly prototype it into equations and logical formations(procedures, methods, functions, etc). As I'm a programmer, and I do this for a living.

Micromol is the more common term for the unit, in my experiences(reading studies, research papers, and the like).

EDIT: Yes... that would be nonsensical. However, on canceling lm... it gives me an idea to create a table of PPFD/watt for bulbs.

I know it more common, but its still too bad..

lol, will you throw in a free Flowbie with purchase??