When would u switch from 125w clf to 250w hps

How do u do if u work with 2 lights ? first 7 days ? 10? 15? also since is very cold can i use cfl very close ? and hps 30cm is the point ? thank you

Skyhound said:

How do u do if u work with 2 lights ? first 7 days ? 10? 15? also since is very cold can i use cfl very close ? and hps 30cm is the point ? thank you

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Basically can use the cfl till the last couple few weeks of veg depending on desired end size. I don't know you're space but if you want them pretty big switch lights once the get a few nodes in them and keep in veg till they're close to the size you want to flower. Remember they might damn near double in size. You can usually keep cfl's pretty close in general. Hps needs at least 30 cm clearance usually but probably more like 40 or 50 cm. What watts? What's your space? Are you going to lst?

Killaki said:

Basically can use the cfl till the last couple few weeks of veg depending on desired end size. I don't know you're space but if you want them pretty big switch lights once the get a few nodes in them and keep in veg till they're close to the size you want to flower. Remember they might damn near double in size. You can usually keep cfl's pretty close in general. Hps needs at least 30 cm clearance usually. What watts? What's your space? Are you going to lst?

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tent is 60x60x1.80 , 4 plants , im gonna veg for 5 weeks , at week 2 transplant to final 7.2 lts. pot , at week 3 im going to use FIM

Skyhound said:

tent is 60x60x1.80 , 4 plants , im gonna veg for 5 weeks , at week 2 transplant to final 7.2 lts. pot , at week 3 im going to use FIM

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60cmX60cmX1.8m? Sorry I'm just wanting to be clear. I'm american and don't usually work with metric. How far along are you? If it was me I'd take advantage of the vertical space as much as possible. Weeks doesn't really equate to plant size because grows vary. Is this your first grow? What is your hps wattage?

Killaki said:

60cmX60cmX1.8m? Sorry I'm just wanting to be clear. I'm american and don't usually work with metric. How far along are you? If it was me I'd take advantage of the vertical space as much as possible. Weeks doesn't really equate to plant size because grows vary. Is this your first grow? What is your hps wattage?

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Not my first grow, but previous was with leds ,my hps is 250 watts

35 years ago

Skyhound said:

Not my first grow, but previous was with leds ,my hps is 250 watts

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Well I'd probably switch to the hps once they're pretty well established. 4 plants in that space seems cramped. Are they fem seeds? What's the airflow like in the space? There's a lot of things here. Hps is gonna put off a lot more heat and humidity is going to okay a factor if you're gonna grow 4 plants in that space through to flower. You also need enough space to keep the hps up away from the plants without blasting them with light or cooking then with heat.
**The list keeps going with my questions.