Save energy

I think its very important to dont waste electrical energy by waste i mean to use energy devices that dont create excess products. First of them id like to write about are light bulbs, most of them produces Heat and Light most have power usage in range from 20watt to 100watt (and upwards for special use) i will make some theoretical calculation on how much energy i use in my house i have 3 rooms bathroom and kitchen in 3 rooms i have 1 bulb each. 1x75watt 2x60watt rest are small halogen bulbs they called GU10 there are 12 of them each 50watt so its 795watt. i think im using all of them together about 4/5 hours lets take 4h so its 3kw per day 90kw per month 1080kw per year. To save energy i want to change all of my bulbs to LED bulbs they dont produce heat like normal bulbs and have very small wattage wit almost the same brightness only thing other than by normal bulbs is the light, its not yellow like by normal bulb but more white with very small amount of blue, for me its ok and i even like it more than normal bulbs. calculations for LED bulbs on the same setup like before look like this: LED bulbs use from 1 to 4 watt max so lets take highest wattage so its 15x4=60watt its 240Watt per day 7kw per month 84kw its over 10X less than normal bulbs!!!! o have nothing more to say i will post again when i change all bulbs to LED and write my opinion about it