5000k full spectrum- useless?

I just purchased an 85 watt 5000k cfl. It says full spectrum, but is this wavelength of light absorbed by the plant?

should i try to get a 2100k lamp? will this 5000k be useless?


thanks

Hell no its not useless..
While its not a 6500k or a 2700k bulb, the plant can deffinetely make use of that. You may want to add a 2700k and a 6500k bulb just so it gets all the spectrum, but that bulb will deff help.
just out of curiosity, how much did you pay for it??

Tomogchi said:

Hell no its not useless..
While its not a 6500k or a 2700k bulb, the plant can deffinetely make use of that. You may want to add a 2700k and a 6500k bulb just so it gets all the spectrum, but that bulb will deff help.
just out of curiosity, how much did you pay for it??

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So adding a 2700K to a setup with a 6500K would help in veg stage? I thought 2700K was only required for flowering?

I already have a 6500K (just using the one CFL at the moment) but I'm getting more CFLs soon. I will need a 2700K for flowering anyway, but should I add it to 6500Ks when its still vegging?.

Also is 6500K needed at all for flowering or just use 2700K? Thanks.

You can grow with just 2700 or 6500, but having a full mix of spectrum will only help the plant. I use both for grows, and so don't many other people. More light can only help, esp. with cfls lol
but 2700 - flowering
6500 - vegging

but i thought the plant cant use 5000k cause the chlorophyll doesnt absorb the light to excite the electron, blah, blah blah. anyone know for sure?

yep, 5000k lights have more green, and plants are green so they reflect green spectrum instead of using that light

thats why all grow lights have decreased green spectrum

blue for veg, red for flower, green... for reading books

would this lamp have any effect on the plant?

Bumpppppppppppppppppppppp

jrod212 said:

would this lamp have any effect on the plant?

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It would help keep it warm if it was cold.
No, it's a waste of electricity. See chart below:
https://www.rollitup.org/attachments/cfl-growing/240662d1226605588-5000k-vs-6500k-hortgraph2.gif

shit. might as well get my money back from that one, and just get that 20 dollar hps. the 85 watt cfl cost me like 36 $ including shipping. called the company today, and they told me the bulb already shipped, so now i have to ship it back and they charge a 35% restocking fee....

jrod212 said:

shit. might as well get my money back from that one, and just get that 20 dollar hps. the 85 watt cfl cost me like 36 $ including shipping. called the company today, and they told me the bulb already shipped, so now i have to ship it back and they charge a 35% restocking fee....

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sorry, well at least you can send it back. Yep those $20 HPS look like they're going to be the newbie grow light of choice. Look on the bright side all the extra weed you'll get will more than pay for your restocking fee. I've got 4100 K & 3500 K bulbs I tried growing with before I found that chart. The difference in growth with 6500 K was shocking.

frmrboi said:

Yep those $20 HPS look like they're going to be the newbie grow light of choice.

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You talking about the ones from places like Lowes? I saw some hps there, but where do you get a cheap (but safe) ballast for them?

Drampire said:

You talking about the ones from places like Lowes? I saw some hps there, but where do you get a cheap (but safe) ballast for them?

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NO that was a complete light with a weird fixture, they're long gone now, they died out on people prematurely too, a "too good to be true" deal
Best hardware store HPS is a outside security light 150 watts minimum. ou just splice a power cord onto them, take the glass off (optional) and hang 'em up (that's the trickiy part)