If you want to reduce your household electricity bill quickly, and who does not in these days of ever rising energy costs? Then the best thing you can possibly do is to change your existing light bulbs for ones that use less electricity. Sooner or later you will be forced to do this anyway as conventional filament bulbs are no longer being manufactured in most areas within Europe meaning that when an old bulb blows you will have to replace it with a lower energy variant anyway. There is a very good case for getting rid of all your existing bulbs right now due to the huge cost savings that a switch to energy saving bulbs can bring.
You can opt to fit either LED bulbs as replacements or energy saving bulbs. LED bulbs are great and they give out a good looking light and come on instantly, they have a very, very long life in between failures and they run cool to the touch. You can now even buy dimmable ones, as well as bulbs with infinitely variable colors. LED bulbs have come of age, however when it comes to considering changing all you existing bulbs over to them you need to bear in mind they sill have a comparatively higher cost when compared to energy saving bulbs. If you have the money to switch to them we would say go for it, but we recognize that not everyone will have the money to do so.
In which case we would recommend the use of energy saving bulbs, which are cheaper at around 30-40% of the cost of an equivalent sized LED bulb. They are just as easy to fit and more readily available. They take a moment or so to warm up and give out the correct color of light and their full light volume.
They last for around 6,000 hours, compared with 50,000 for LED bulbs but you do need to factor in the greater upfront cost if you want to switch to LED's.
Overall there is a very good case for switching over to either one, as LED ones use around 90% less electricity, and energy saving bulbs use around 75-80% less electricity. If it comes down to cost though then energy saving ones are the way to go, as they are at prices that are low enough to consider swapping them out in your whole house.