Outdoor Northen Lights Auto Grow Journal

[Spanglish]

Hi greenjeans, by sqft is only the length and width that of the grow space that are used, as this is the area the light is covering, the height of the bulb does not matter, that is why it is better to add side lighting lower down to increase the lumen level in the areas where the top light don't penertrate as much, if possible get a light meter they can be downloaded as apps for phones, most read in lux but this can be converted to lumens sqft online, measure the light levels at various parts of the plants canopy and try to get the recommend lumen coverage in all areas.

 

[greenjeans]

That really helps, guys. I appreciate it. Every time I hear that my mind goes to cubic feet for some reason, and I start thinking "96,000 lumens!?@#%@!". My light output should be plenty for my 2x3 space, then.

 

[oldster]

I've used this before to calculate but Idk hoe effective it is http://www.cannaversity.com/calculators/lighting.php

Took a look at the calculator and my concern is that I don't see where it takes into account the type of light. Big difference in watts required to produce the needed light between CFL, HID and LED. I am thinking they may be assuming HID based on the number of watts it calculates

 

[MisterHarpy]

That's why I said I didn't know how effective it is,I think your right and it's based on hid, now I always knew led and hid can't be compared by watts as gn hs1 75w is equivalent to a 250w hps. But I always assumed that cfl watts are almost similar to HPs watt. Not exact but almost similar. There's so much info on HP's and led but CFLs seem to not have as much info. When I made my veg room I just used that claulator to tell me how much lumens I needed in there. Looked to see how much lumens each bulb produced and went on from there, but I was displeased of how much lack of resources there was with CFLs,

 

[greenjeans]

Looks like it is probably geared toward HID lighting. Lumens would probably be more useful, since that is an actual measurement of the light itself.

 

[greenjeans]

That being said, I am a new grower, and am not as familiar with all of this as many others are. I am all cfl at the moment. if I end up sticking with this hobby I will probably end up moving to LEDs when I have the cash.

 

[greenjeans]

I've got my eyes on that Mars Hydro gear..

 

[greenjeans]

That's why I said I didn't know how effective it is,I think your right and it's based on hid, now I always knew led and hid can't be compared by watts as gn hs1 75w is equivalent to a 250w hps. But I always assumed that cfl watts are almost similar to HPs watt. Not exact but almost similar. There's so much info on HP's and led but CFLs seem to not have as much info. When I made my veg room I just used that claulator to tell me how much lumens I needed in there. Looked to see how much lumens each bulb produced and went on from there, but I was displeased of how much lack of resources there was with CFLs,

Information that I have found says that CFLs put out about half of the lumens per watt as HID.

 

[MisterHarpy]

Information that I have found says that CFLs put out about half of the lumens per watt as HID.

Thanks, to clarify , let's say there's 2 bulbs a cfl and a hid although they both are 250w the hid will produce 40k lumens while the cfl will only put out 20k correct?the numbers are made up of the top of my head, don't know any lumens exactly just trying to make an example as im Just trying to get the hang of it

 

[greenjeans]

This is the info I found(on another forum)..

Approximate light production:
Incandescents: 17 lumens/watt
Mercury vapor: 45-50 lumens/watt
Fluorescents: 60-70 lumens/watt
Metal halide: 90 lumens/watt
High pressure sodium: 107 lumens/watt