quick question

[bluntman 420]

actually 2 quick questions. can i leave my light on my plants 24/7 till flower? and my next question is should i bother getting a 75 watt hps to add to my grow box?

bluntman 420 Reviewed by bluntman 420 on 01-20-2007. quick question actually 2 quick questions. can i leave my light on my plants 24/7 till flower? and my next question is should i bother getting a 75 watt hps to add to my grow box? Rating: 5

[bluntman 420]

?????????????

[divestoned]

apparently anything over 18 hrs is more than the plant processes,so anything more is waste of electricity.and for your second question...there's really no such thing as too much light.

dive

[kdspecial]

No one wants to answer you because you obiously haven't done any basic reading on your own.

But

You can leave your lights on 24 hr for the vegitative cycle of the planst life. Or up till its time to flower the plant. (Some do and some recomend giving the plants a break. If your using a Cab I would give it an 18/6 light cycle cuz its probs gonna get hot in there.

Add your hps If you like, more light bigger plants, but make sure that the temps are in the right area for that you'll have to read on your own. I would recomend using the CFls for Vegitative Growth and the HPs with the Cfls for flowering.

good luck

kd

[invision]

the more light the better but what are you using already???

if your using something like 400watts than a 70watt hps would be just dumb, but if its adding against CFL than its 100% worth it.

[kindprincess]

i stay on 24/7 through veg and then go 12-12. but i do this to regulate temps more than for the light...

[bluntman 420]

yah see kp when i have the lights off in my box the temps will fall to 60 degreez farenheight, possibly lower. so i need to have my lights on 24/7. im using all cfls, gor now i got two 26 watt cfls and a 13 watt cfl. imma go to wal mart and get four 43 watt daylight cfls then im gonna get a 75 watt hps.

[Chronic Chrissy]

" Light Cycles

The dark cycle is very inportant to palnts. Respiration(this is when plants are making energy from sugar to oxygen) Continues in dark but at a much slower pace, almost independent of available oxygen because the leaves are not making oxygen in the dark.

In the dark there is a shift from leaf production to root production as the leaves transfer excess energy down to the branches and roots. Therefore, some dark time allows for better root structures. The "Experimental Root Growth 10 Days After Cutting" graph on page 33 shows that giving plants a 24-hour light cycle is not the way to supercharge growth"

This is from "How to supercharge your garden" With the graph on page 33 this follows...

"Light period for cuttings

PLants have a free running internal bio-rhythm of 21-27 hours. In this rhythm, they need dark time. Cuttings have a built in daily rhythm that they inherit from their parent. Cuttings will root better with a 6 hours to 8 hourdark period because this is the main time when leaves and the stems transfer energy down to the root zone for storage and growth."

The chart has hours of light per day on the bottom, and length of roots in millimeters.
-@ 4hours of light the roots after ten days were only 22mm long
-@ 8 hours of light after 10 days the roots were 25 mm long
-@12 hours of light we shoot up to 40mm long
-@16 hours it peaks at 50mm
-@20 hours it drops down to 37mm
-@ 24 hours it drops down to 29mm

There is also a shitload of info regauring root to yeild ratio vs veg to yeild ratio, and draws the conclusion that at the end of the experiements the root to yeild ratio was higher



I figured this could be useful to you.

[bluntman 420]

wow, thanks alot. so i guess 24/0 aint the way to go then.

[Chronic Chrissy]

depends on who you ask, I know this and still use 18/6