How many Cfls = 5000lumen?

[jonathanling]

How many 23watt CFL's makes 5000 lumens?
and is 5000 lumens used when flowering?

jonathanling Reviewed by jonathanling on 04-09-2009. How many Cfls = 5000lumen? How many 23watt CFL's makes 5000 lumens? and is 5000 lumens used when flowering? Rating: 5

[stinkybudz]

mmm between 3-4, and its 5,000 lumens per sq foot, do your floor print L x W (in inches) and divide by 12, times 5,000, thats how many lumens ya need

[headshake]

depends on the output of your CFLs.

and it's the more light the better!

-shake

[stinkybudz]

depends on the output of your CFLs.

and it's the more light the better!

-shake

true that, just a referance point, headshake i admire you, and your ghetto grows, represent whoop whoop

[headshake]

thanks stinky! i really appreciate that. i do what i can with what i've got to work with.

and you are pretty right on with your bulb number estimate, btw.

-shake

[jonathanling]

mmm between 3-4, and its 5,000 lumens per sq foot, do your floor print L x W (in inches) and divide by 12, times 5,000, thats how many lumens ya need

hey, i've got 19x18inch space. according to your method, does that mean i need 142500 lumens?

[bigtopsfinn]

hey, i've got 19x18inch space. according to your method, does that mean i need 142500 lumens?

19" x 18" = 342 square inches

342 square inches / one square foot (12" x 12" = 144 square inches) = 2.375 square feet.

2.375 sq.ft. x 5000 Lumens = 11,875 total lumens


One (1) 23w cfl produces 1,550 Lumens (at least the one I was looking at, could vary a little, so adjust accordingly)

11,875 Lumens needed / 1,550 lumens per 23w cfl = 7.66.... so you will need at least 8 x 23w cfl's to reach over 5,000 lumens per square foot.

If you can keep the temps in range, I'd throw in a few more just for good measure :jointsmile:

[jonathanling]

ahhh, thanks a load dude

[the image reaper]

go here, click on your particular bulb, and read it's details ... shows lumens, life, etc... very reliable place to buy from, too (Texas company)
2 to 200 Watt Compact Fluorescent Bulbs : 1000Bulbs.com :thumbsup:

Bigtopsfinn had it right, the 23-watters put out about 1600 lumens apiece, btw :smokin:

[nomadinexile]

That's one measurement of a much larger picture. Useful spectrum lumens received is really what you are concerned with. From Maijuana Horiticulture: The Indoor/Outdoor Medical growers bible, by Jorge Cervantes recommends 10,000 output lumens for a flowering plant. I have heard lower amounts used though. Also, different 23 watt bulbs have different lumen counts. Many variables

I would try using two 23 watts per square foot. 50 watts per square foot, while a very basic measurement, still works within the normally used lighting types like cfls and hids. But the more watts you can put it, and still keep it cool, the better off your plants will be.