I am in the process of changing the flourescent tubes in my workshop to LED tubes. I am also changing the battens to LED specific ones. I decided to change as the original tubes were becoming increasingly unreliable and one choke was getting too hot to touch. They're 20 years old, so time to change. I chose high colour temperature LED tubes, 6500K. Impressions so far are good; the tubes start instantaneously and give a bright, almost clinical, light. I should save between a half and two-thirds the power of the flourescents.
Having had LED downlights fitted in my recent main bathroom and kitchen refurbs, and fitted new wall lights with LED bulbs in the lounge, I am now changing all my house lighting to LED. For the house I chose a lower colour temperature, 4000K.
I expect there to be a significant power saving as well as better, brighter, light.
Andrew