using both veg and flower switched to on with led during flower stage?

can using both veg and bloom set to on during the whole flower cycle give less yield is really what i'm asking

assuming it doesn't push into "too much light" it's a good thing. 'vege' and 'flower' mode is more of a marketing ploy than anythign else. Yes, certain wavelengths impact how it grows, but never more than a small variation to what the genetics dictate... e.g. a tall lanky pheno will not turn into a squat bush if you only give 'blue' wavelengths or higher proporiton of blue in white light etc... it may be a statistically significant difference, but that doesn't mean it is a huge difference... it has an effect but it will not outweigh giving more light and the benefits that brings. (up to some local 'max' .. which is relative to available atmospheric co2, temperature, rh% et al). colas are mostly genetics, assuming you provide more than the minimum amount of light... if you are providing near "max" for your environment, feeding well and generally happy plant, it's going to grow as thick as anyone else fullfilling those requirements... adding co2 can bulk them up more, but also need to provide more light. DLI -- this explains it better. read up on Daily Light Integral. you don't need the math.. just understand light is measurable and that proving X number of photons over 12 hours or 18 hours has very little difference... that watts are not the key here, but umol/s produced by the light and the area in which you spread that light out. DLI is an apples to apples comparison... for example, regardless of our garden's differing sizes or whether you grow photoperiods or autoflower, you will max out around 35-40 DLI before you start damaging the plant with too much light... this is mostly based upon atmospheric CO2 levels, but those that control VPD (result of temp + rh) will probably have better results all other things remaining the same. 20-30% increase when using co2... but costs may or may not be worth it. you'd hve to run the math.. also, sometimes "more" is not necessary, so focusing on it isn't the best way to go for all growers... if it's revenue, then you worry more about yield. if it's personal smoke, enough is enough. quality doesn't increase, just yield. Anyway, generally suggested minimum is 21-22dli to form decent nugs that aren't total larf. 35-40dLI is what you want to shoot for in ambient co2 conditions and 50-60dli in 1200-1300 ppm co2 regulated conditions. environmental control becomes more important with co2 too, since you are spending extra on it, you might as well get all you can from it... if you do. efficacy is a big factor.. some lamps provide more light per watt... so an extremem inefficient light might need 50w/sq ft in a 12/12 light schedule, while the highest efficiency LED grow lights will need 30-32ish. it's nearly 50% more watts for the old hid and shitty LED lights to produce same amount of light per day (DLI is better measurement to use) some trial and error is needed --- obsesrve and react. stretch = more light needed.... burnt pistils, short internode lengths, et al tell you there is too much light. if you can hit "too much" back off and feel confident you are pushing upper boundaries.. if not, keep using 100% power because if there is no damage or stunted growth, it's not too much.

also i'm only using half the tent which is using a little less than 140 x 140 (tent is greenfingers 280x140x200)

i can't reply to comments but even if it is a terrible light or the space is too big, etc is it better to use both veg and flower set to on?

Average * Average Power Draw: 395 Watt * Ideal for vegetative coverage of 4ft x4ft at 24" height * Ideal for flowering coverage of 3ft x3ft at 18' height tu hai un box piu grande quindi la luce si disperde in piu se lo tieni alto le piante faticheranno di piu...

mi dispice dirlo ma hai un grosso problema di luce non so che lampada tu stia usando ma il problema piu grosso è quella non è questione di veg o flower è questione di potenza dovresti vedere il consumo reale della lampada se sono quelle che consumano 100w e dicono 1000w stai tranquillo che si comportera' come un 100w da cosa si capisce?dalla distanza tra gli internodi le ramificazioni sono piccole e i bud non crescono... poi valuta anche la distanza tra la lampada e le cime se ce n'è troppa anche una lampada led potente fa fatica

couldn't fit this in, the light is greenfingers 2000w led