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Comment by Bob Campbell on March 24, 2012 at 2:27pm

Take a look at this!

http://chicoaquaponic.blogspot.com/2012/03/lights.html

Comment by Bob Campbell on March 22, 2012 at 12:46pm

Costco has a good price to begin with (about $8.00), but there were some rebates that knocked another $2.00 off the price.  So each box of 4 costs $5.99 right now.    I was going to use T5 bulbs, but I saw that, and did the math. 

I'm waiting for a response from the manufacture for more information about the light spectrum.  All I have been able to find so far is that they are "Full Spectrum".  I'm hoping this will work for me, if not Costco will take them back. 

I'll post a picture of my finished grow lamp and the specs if I hear back from Feit Electric.

Here are the specs on yours.  I think 5000K is good for a grow light.

Additional images

Philips 41409-4 - 26 Watt - CFL

100 W Equal - 5000K Full Spectrum - 82 CRI - 114 Lumens per Watt - 15 Month Warranty

Comment by Devin Duhaime on March 22, 2012 at 5:52am

Thanks I'm also impressed by the growth,,I was just wonder if this is the bulbs?,,,The only reason I ask, is thats cheap for the bulbs,, I paid like$20 for 4,,,,I'll have 2 start shopping at Costco,,,lol

Comment by Bob Campbell on March 21, 2012 at 11:29pm

Thanks, 

I'm really impressed by the results you have had with CFLs

Today I bought 16 23W CFLs today at Costco for $24.00 and 16 lamp bases for $20.40.   Total cost $44.40

25600 lumen or about 577 lumen per dollar, and a total of about 370W.

My grow bed is only 25 sq. ft so I'm hoping 1000 lumen per sq ft will be enough. 

Comment by Devin Duhaime on March 21, 2012 at 8:58am

Thre is 19cfl at 23 watts daylight = a 100watts each, 6 T8 Daylights=32watts each n 2 T12=40watts n thre cool white,,

Comment by Bob Campbell on March 20, 2012 at 10:59pm

I counted 11 23w CFL and 4 -  32w T5 florescent bulbs.  Did I get that right?