This two lightweight skeleton grids can hold twelve CCFLs (cold-cathod-fluorescent-lamps) in place.
Eight on the upper layer (in my case UV) and four on the lower layer (in my case white).

The CCFLs to use are the ones for case modding
with 1.5cm sidelength plexiglass cubes at the ends (I used Revoltec).
Once it's acomplished to get them all in their pockets at the same time
which can be quite tricky they are hold in place very thightly.