SpidersWeb Posted October 25, 2007 Report Share Posted October 25, 2007 Should also mention here that the '18000K PowerGlo' is a 6500k tube (or close to it, something like 6700K according to their data) and it has peaks at the appropriate colour points for chlorphyl use in plants. Sorry I can't remember the terminology properly. Don't know why they call it 18000 kelvins, its definately not. Possibly because of the purple it gives off when you look directly at them. Much better for plant growth than a standard 6500K tube. *edit: completely 100% agree with what purplefish said above Quote Link to comment Share on other sites More sharing options...
jayci Posted October 25, 2007 Report Share Posted October 25, 2007 So where is the cheapest place to buy growlux, Powerglo and other tubes. Planning on building a 4 foot light hood that is going to take 3 or 4 4 foot t12 light. I figure I can use one of each, then I'll be covering all bases. I got 11 industrail light fittings for $1.00, so I'll make use of them. Quote Link to comment Share on other sites More sharing options...
HaNs Posted October 25, 2007 Report Share Posted October 25, 2007 So where is the cheapest place to buy growlux, Powerglo and other tubes. Planning on building a 4 foot light hood that is going to take 3 or 4 4 foot t12 light. I figure I can use one of each, then I'll be covering all bases. I got 11 industrail light fittings for $1.00, so I'll make use of them. I get my tubes from the local electrical wholesalers, $4 for a large tube in 6500k Quote Link to comment Share on other sites More sharing options...
SpidersWeb Posted October 25, 2007 Report Share Posted October 25, 2007 But they wont have the spikes at the wavelengths used by chloryphyll (spelling?). Using industrial 6500K gave me more algae and less growth. PowerGlo etc or purple glow lamps are much better for growing plants as they have much higher output in red and blue wavelengths. A $4 6500K tube is not the same as a PowerGlo or GrowLux for plants. Only place that stocks them normally is pet stores, and they vary in price, think around $20?. If you're not growing plants then just get the $4-8 versions from your wholesaler as HanS mentions. Definately don't use T12 though offers the least intense light and tubes are huge. Quote Link to comment Share on other sites More sharing options...
jayci Posted October 25, 2007 Report Share Posted October 25, 2007 defiantly want te powerglo and grolux. I'll have to phone around. LFS guy must get them from some where. Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted October 26, 2007 Report Share Posted October 26, 2007 Shops selling hydroponic equipment (mary jane's friend) normally stock growlux as well. There are a number of brands similar to growlux with different names but similar prices. Everyone to their own but I find a growlux and a soft white works better than straight growlux. Others prefer daylight (6500K) but I doubt that 10000K will do the job. Quote Link to comment Share on other sites More sharing options...
Bichon Posted October 30, 2007 Author Report Share Posted October 30, 2007 would switch on gardner stock any light bulbs that people like us can use it? Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted October 30, 2007 Report Share Posted October 30, 2007 They normally stock the growlux type tubes as that is what is often used to grow the switched on herbs. They will be cheaper if you can find out where they are buying them from. Quote Link to comment Share on other sites More sharing options...
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