What does the bar mean?

On my main page I used progress bars to highlight my skills in working with software tools. I think it is important to further clarify this, because you might think my name is Linus Torvalds and not Henke, if you see a full bar at any technology.

Skill Level 5
Tools with this level of confidence are tools I feel most comfortable with. I can use it to accomplish some complexity and have knowledge of advanced features of the tool.

Skill Level 4
I have used the tool quite often, and am confident in using it. I know some of the deeper tricks within this tool and my work starts to look better and is not just usable.

Skill Level 3
I have done some little projects with this tool and feel comfortable enough to work independently with it. The work is not very pretty, but usable

Skill Level 2
I have messed around with the tool a little, maybe had a lecture where it was used. I can realize some tasks, but it is not pretty and I still have to use a lot of documentation.

Skill Level 1
I have done very little with this technology, and can only work with heavy use of documentation and can't accomplish great complexity.