Retrofit Hotel with dimmable LED lighting system

As most current hotels are just using traditional dimmable lighting system,like halogen,fluorescent vapor and metal halide lights with triac dimmers.

So how to change a hotel into a LED dimmable  lighting system with min surgeons and cost?

To fit this purpose, the dimmable powersupplies have come out with a improving performance.It has current features:

• fit world wide input voltage from 85~265V AC
• 5V DC, 12V DC,24V DC Output
• PWM
• powerfactor reach 0.75

see a diagram with such a system