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What about Terawet water absorbents?Like a diapers but special developed for plants. :)

What is advantages of doing this vs 12/12 ttystikk?

Mail envelope is regular mail envelope.If you buy full package of seeds they are send with their original breeder or seed company package...If customs open your mail they will realize what type of seeds is there,even without a picture I think?

This is dependent of drivers,but they have around 90% efficiency.Difference in efficiency in 110/220v is under 5% for sure.Heat from drivers is ~10% of all heat, the rest ~90% is heat from LEDs.If still not sure just try.

I am with you...But what is relation between wiring and heat dissipated from panel If wiring is proper(110 or 220v) ? If you don't exceed rated current there no heat in wiring.

wattage=voltage x amperes 600w= 110volts x ~6amps 600w= 220v x ~3a Temperature will be the same.

Hi,this lamps looks too small to be 125w,I think.Maybe this is compared to incandescent lamp power?Consumed power is count. Sorry about shitty language.