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this is not 100% true. the damage signal from removing a leaf actually primes plants to defend themselves agains necrotrophic pathogens (or hemi-necrotrophic like botrythis). this means plants become actually a tad more resistant to certain pathogens. the only condition which really maked...

sorry i think you confuse me for someone else

plants perceive gravity and light. when a plant germinates the roots grow down while the seedling grows up. the upwards growth of the seedling is just inverse gravitropism, ie the aerial part growing opposite of where the gravity stimulus (perceived in the roots) points to. the negative...

for plants like cannabis nothing increases the production of secondary metabolites like a damage signal ;). maybe spraying Jasmonic acid on it could work as well, but i never personally tested it

there are a couple of argument in favor of defoliating during flowering. with many caveats hoewever, and should be done cautiosly. first of all I would like to say that the argument "leaves are the power cells of plants" etc etc etc is not 100% correct. in indoor conditions, if leaves are not...

one of the beautiful things of indoor growing is that you can push your plants to the limits of yield, though experience and experimentations. but, where is the actual limit? in indoor growing (especially hydroponics) there is a limit of nutrients you can apply to your plant. depending on...

thanks man, that is a very newbie-friendly way of explaining it hehe cheers

but could a single diver run 5 of them? also will they be in series or in parallel? newbie questions hehe

bumping my old thread again with another question, as the order time approaches. will such driver: HLG-185H-C1050 (here the specs http://www.mouser.com/ds/2/260/HLG-185H-C-SPEC-806161.pdf) be able to single-handedly power up 5 CXB3690 32V? according to @SupraSPL tables such LEDs would draw...

actually i'm planning to order on february as well. i guess you are in france (and i am in uk) but maybe is still covenient to make a single order with multiple COBs and extra parts. dunno

thanks man, i was looking to PM you this question actually but i couldnt yet. after looking around i found that many retailers (like mouser) barely stock CXAs anymore, and the prices are definitely not clearance. thanks for clarifying the difference between 36 and 72V, because i couldnt figure...

there are some economical arguments against the fact that some huge solar fields are just made for speculation, rather than having any effects on imputting "green" energy into the grid. however this is definitely not the case, and thinking that those "arguments" came from a retired science...

merci. are you sure though that 4x CXB at 1.4A would draw only 55W each? seems a bit low to me. i have another general question though: do you guys put lenses on your COBs or just run them "naked" as they are? cheers

great info thanks! in fact the CXA series are the old one and less efficient. I'll look in more details into the CXB one

thanks. i guess the only drawback to that is that you have to buy more COBs (and then price goes up), but many retailers force you to multiple orders anyhow cheers

Hey Rollitup community, As many here I'm thinking of giving a try to DIY-build COB LEDs. So i started reading datacheets, comparison charts and even dummy electrical engineering books (as my knowledge of current electricity and circuits is not that good since highschool times hehe). So i set...

sorry to necro an old post in an old thread, but i figured i could share my knowledge since the topic is of interest to many people. having sugar in the nutrient solution is NOT beneficial to the plants. as mentioned already the sugar is not optimally absorbed through the roots, and it actually...