If you live in your own house in one of the colder parts of the world, the largest amount of energy is consumed for heating.
If you switch to low-power fluorescent lighting, which emits less heat, you will raise the amount of energy needed for heating (a little).
Hence, you gain very little.
If you live in your own house in one of the colder parts of the world, the largest amount of energy is consumed for heating.
If you switch to low-power fluorescent lighting, which emits less heat, you will raise the amount of energy needed for heating (a little).
Hence, you gain very little.