The right Kelvin?

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Sabzi

Well-Known Member

Nov 21, 2009

• #1

Hi Guys

does anyone know if "Osram L36W/840 Active 3350lm" is in the range of 5000K to 6500K and suitable for vegetation?
I have been searching with no luck. It says on the lamp that it is "Daywhite" but I don´t know if it is just another twist of names for commercial purposes or the real thing.

Thanks

 

smallclosetgrowr

Well-Known Member

Nov 21, 2009

• #2

if it says daylight then your good

 

S

Sabzi

Well-Known Member

Nov 22, 2009

• #3

smallclosetgrowr said:

if it says daylight then your good

Click to expand...

Thanks man I think I post some pix to be on the safe side.

 

TANDY

Member

Nov 22, 2009

• #4

if its in that range id say yes for veg

 

S

Sabzi

Well-Known Member

Nov 22, 2009

• #5

I have eight AK-48s. I am not going to veg them more that two weeks so I want to get the most out of these two weeks.
i will be glad for all inputs and recommendations!

 

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Sabzi

Well-Known Member

Nov 22, 2009

• #6

Thanks Tandy
The problem is that it doesn´t say anything on the lamp!
I have been at their site but could not find anything on this lamp.

 

robert 14617

Well-Known Member

Nov 22, 2009

• #7

[SIZE=+2]F/48INCH/T8/G13/36W/841[/SIZE]
bulb specifications: category:Fluorescentwatt:36base:G13 - Medium Bi-Pinglass:T8m.o.l.:48 inch (1219MM)cri:82color temp:4100
notes:

glass color is: universal white
glass color is: white deluxe
uses socket:DB-G13-A


this is close and its in the 4100 range

 

bigtomatofarmer

Well-Known Member

Nov 22, 2009

• #8

When I did a search for Osram L36W/840 Active 3350lm, this thread was googles first search return.

To answer your question, it looks like its a basic t8 flourecent bulb, 36 inches long. It should be fine for now. But I would reccomend HPS/MH pretty soon. Good luck

 

S

Sabzi

Well-Known Member

Nov 22, 2009

• #9

Thanks robert 14617

Per https://www.rollitup.org/cfl-growing/107992-tutorial-growing-cfls.html:
"Do what you can to avoid bulbs within that 3500K – 4000K because they emit very little light that Is useful to your plant".
So I should probably look for alternatives then.
By the way where did you find this info?

 

S

Sabzi

Well-Known Member

Nov 22, 2009

• #10

Thanks bigtomatofarmer

I have an 400w HPS GroLux and my seedlings are three days old.
When do you think is a good time to change the light? As I mentioned before I don´t want to veg them more than two weeks maybe I need more time?

 

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pokesalotasmot

Well-Known Member

Nov 22, 2009

• #11

If you're not sure, I wouldn't use them, especially if you want to get the most out of a two week veg. If those bulbs are 4100k, thats about the least desireable light you would want to give your plants.

Personally, I learned my lesson a while ago. I always make sure that the bulbs I am buying have the kelvin rating printed right on the package. I don't leave anything open to speculation or guesswork. I don't even go by the terms "daylight", "softwhite", etc. I go by the color temp, and if the package doesn't have it printed on it, I'll pass.

 

S

Sabzi

Well-Known Member

Nov 22, 2009

• #12

Three days old

 

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Sabzi

Well-Known Member

Nov 22, 2009

• #13

Thanks pokesalotasmot

Recommendations? Change to my 400w HPS Grolux?

 

riddleme

Well-Known Member

Nov 22, 2009

• #14

the pics of your lights look like they are in the red spectrum, wrong for veg
You should be in the 6500K range

put that in your search to find them, (it's how I find them)
google the type and size and spectrum ie: f48t8 6500k

 

S

skervy

Active Member

Nov 22, 2009

• #15

that light looks alot more orange then blue id say.

 

S

Sabzi

Well-Known Member

Nov 22, 2009

• #16

Thanks riddleme

can I continue with T8 (with the right spectrum) or change to CFL?

 

riddleme

Well-Known Member

Nov 22, 2009

• #17

T8's (in the right spectrum) are fine for seedlings and clones, you'll want more light after 3 weeks
cfl's work great but as I say in al my lighting post check out Ceramic Metal Halide works for both veg & flower and has uv, does not have the heat issues
if your interested in more info pm me