How can you not understand that having low energy bulbs means you are using heat and energy more efficiently?
For example lets say I need the heating on 6 months of the year. Then 6 months of the year I'm wasting the heat off lighbulbs.
So only of use 6 months of the year. The other 6 months you are wasting energy.
Then you have to factor in gas is much cheaper than electricity. So I'd rather my gas central heating was heating the home than my lightbulbs.
In fact it would be better to run a mining machine for heating which offsets heating costs for a profit or break even than paying for heating.
So no light bulbs are not the answer to heating your home.
I am not saying that there is no benefit, simply that the benefits, especially as regards CO2s is rather more limited than is made out, especially if you are living in a new build all-electric home.