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Shiva Grows
- Thread starter shiva82
- Start date
exoticrobotic
Well-known member
Well DaEarl,
I'll bite!
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
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.
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 .
i'm not a winter or fan of the snow . we are expecting snowfall tonight too . i hope it melts by the time i wake up . i doubt it though
dogzter
Drapetomaniac
https://hyjo.co.uk/product/gavita-p...MI-fzB2aXmiQMVnIlQBh3lGwX1EAQYAiABEgIJCvD_BwE
gavita pro plus i meant . not the older pro model. pro plus is a decent single source bulb
gavita pro plus i meant . not the older pro model. pro plus is a decent single source bulb
i hate the cold and the dark and all these folk that say ' isn't it great ? having to wrap up and cosy up on a sofa'Love it myself I dislike summer quite a bit.
i always want to say, ' oh fuck off'
exoticrobotic
Well-known member
I'm wearing two pairs of socks a woolly hat and coat.
Supposed to be -2 tomorrow in UK which is more like -30 in the US.
Supposed to be -2 tomorrow in UK which is more like -30 in the US.
brutal man. only 3 months to go until spring . is how i look at it . i get depressed at this time of year with lack of sun
exoticrobotic
Well-known member
me too . we are only human . as long as we try are best to be tolerant . that is all what matters . maximum effort. i'm like the character ,victor meldrew .Makes me grumpy and argumentative.
Moreso than usual
