Poverty with negative innovations is the dumbest reply that one can ever have for this kind of post. Mr man, inventing something that uses less energy is the talk of technology these days. What u just said is called being lazy mentally. Look at cars nowadays cosume lesser fuel than cars of before. I use a 2006 corolla, it consumes lesser than vboot that my grandma uses before. Is that a negative innovation? No. So think well before replying to a post. YOU ARE A TYPICAL NIGERIAN, lol

I would like to get the device how much does the digital cost

Energy can not be created nor destroyed: but can be change from one form to another. The efficiency of your conversion from one form to another will tell of the current outcome. For example a 100 watt incandescent lamp will produce a light that is lesser that what a 100watt white spiral bulb will produce: where does the extra light energy come from? Its from the conversion so my brother it is very possible when you have an efficient conversion technolgy. Of which the efficient conversion of a yellow bulb is just 20% unlike the white spiral bulb with abt 70% efficiency. In china today they have even campaigned against the use of white fluorescent spiral bulbs. Now they use led bulbs with abt 98% efficiency. If i continue you will get bored thanks. Check out that technology on google maybe you will get more info.