DC to AC inverter

Hi everyone ,i would like to come out with a frequency generator that is able to give me an output power of at least 1.5W,i found this circuit in a forum and the guy who create it says that he managed to use this to drive a 11W light bulb.

So i would like to ask, if i never install the transformer,can i achieve at least my 1.5W output??(since energy cannot be created ).My load is 1000ohm.

Thanks for replying.

This is the link of the forum
Aaron's Homepage Forum - Queries on DC to AC circuit using 555 timer

It all depends on what your load is, which you don't mention.

I hope im telling the correct thing, my load is around 1000ohm

chopper said:

I hope im telling the correct thing, my load is around 1000ohm

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Well work out what voltage you need to produce 1.5W in a 1000 ohm load - you're going to find out it's no where near as low as 12V.

i know i will get a great V if i assume my power=1.5W since P=V^2/R.im actually more concern on the output power,i don really care how much voltage is the load,

so is there a problem to achieve 1.5W with it without the a transformer?