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Shiva Grows

exoticrobotic

Well-known member
People that dont like leds, run too cold rooms imo, i will Never go back to hid, maybe if living in Alaska (or uk hahahaha) Because The extra Heating would be to expensive.

Well DaEarl,

I'll bite! :cool:

It's horses for courses, depends on you environment.

You are correct. I run hids because with leds the extra heating would be too expensive for me.

If you live in a cold environment like the UK and can choose between 300W light with or without radiant heat the one that provides some radiant heat may be better during winter months, unless you want to spend the extra $$$ on heating while the lights are on in addition to when the lights are off where a heater is needed irrespective of led or hid choice.

In the UK during winter, if you grow outside of your heated living space, you must still maintain a certain temperature range for healthy plant growth as heat is essential to transpiration and nutrient uptake. if you fail to take these things into consideration yield and plant health become adversely affected.

It's bloody freezing here presently in the UK. If i was running my leds i'd be seeing all sorts of weird leaf browning and yellowing and slow growth from the NPK ratios going skewed unless i heated my tent/pots and monitored vpd constantly which is a ballache!

Phosphate uptake is drastically reduced with cold roots which is essential to flowering.

"Low soil temperatures reduce overall growth and tend to increase carbon allocation to roots because nutrient and water uptake are reduced (Lambers et al., 1995; Li et al., 1994). At low soil temperatures, shoot demand seems to control uptake and translocation of N, K and Ca, but not P (Engels et al., 1992). Phosphorus uptake is usually more depressed by low soil temperature than is the uptake of other nutrients (Bravo‐F and Uribe, 1981; Engels et al., 1992). This may be mainly due to reduced root growth because at low temperatures phosphate uptake is dominated by root production rather than by chemical nutrient availability in soil or by physiological uptake capacity (Mackay and Barber, 1984)."

From https://academic.oup.com/jxb/article/52/362/1913/601746

hids simply work out cheaper and easier for me as i dont have to run heaters as much or look constantly at a vpd chart or use calmag :LOL: I get roots like a matt throughout the whole pot which means larger flower yields.

Of-course, If it is warm and you got your temperature sorted, vapour pressure deficit dialled in, and a massive bottle of calmag leds can be worth a go but at 300 to 2 grand for leds vs 150 for hps setup i know which i'll be using.
 

dogzter

Drapetomaniac
IMG_20241116_083910_2.jpg

I definitely need the heat.
😆
 

shiva82

Well-known member
i like the 'gavita pro 1000 watt de 'the best for a single light source .... only problem is you need over 2 m of height . i tend to use both cdm and led . this last year , only l.e.d . all the bud has been decent imo . i sold my 1000 watt de gavitas as i don't have the space anymore .
 

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