Hi! Electric heater or infra-red electric heater? Which is the best?

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in terms of economical consumption , efficiency?
electric heater (resistance) >>>>>>>> 600w+600w+600w = 1800w
http://www.google.com/imgres?start=176&u...

infra-red electric heater >>>>>>>>>>>> 400w+400w+400w = 1200w
http://www.google.com/imgres?um=1&hl=fr&...

thanks,

in terms of economical consumption , efficiency? electric heater (resistance) >>>>>>>> 600w+600w+600w =...


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