"Science ... provides technologies that have had a great impact
Whilst it is true that a 50 W halogen bulb gives out more light than a standard 50 W lamp, their design is such that much of the emitted light is concentrated in a narrow angle - so lots of them are needed to provide reasonably uniform lighting in a room.
Although individually more efficient than a standard bulb, the fact that more need installing means the total power is higher than if a standard 100 W or 150 W bulb was handing from the ceiling with a diffusing lamp shade over it.
So whilst they look "high-tech" and do work very well, they generally do so with a much higher running cost and "carbon footprint" - not exactly as 21st century lighting solution. Luckily, scientists have found a solution...