Power different types of lamps in single circuit
Yes, there are several solutions which have less power consumption than the sketched common-parallel circuit of 4.23 W.  Given that this is an exercise, you need to explore the situation to develop your understanding.  Try working on these things:


What's the minimum power consumption of any circuitry for the three lamps using batteries of any voltage whatsoever?
What set of circuit connections would give you that consumption?
If you could use any number of 1V batteries (instead of 1.5V), could you build the circuitry of step 2?  What would it look like?
Keeping everything the same except the number of batteries, what would the minimal power consumption of the circuitry be if you had to use 1.5V batteries instead of 1V batteries?
Is that consumption better than 4.23W?
Now explore other arrangements of lamps after thinking about these things: 


any power consumed by a resistor you add is wasted
a lamp itself has a resistance, and can serve as a resistor
if a lamp serves as a resistor, it saves the power the resistor would have used