I saw many posts here regarding poor visibility of signal lamps of the DL.
The root of the problem seems to be the missing reflector in the lamp assy (cost saving? Good Morning Suzuki!).
Some folks tried with silver paint, others with alu tapes or even with egg cups/boxes on the inner surface of the lamp housing.
Almost all of them reported big improvement compared to the original.
But as far as remember only one fellow posted pics (link to his album) and those pics don't show the difference, but only the final result. You cannot see and judge whether the mod is worth the effort or not.
As I was interested in a simple and cheap mod and curious about its impact I went for the alu tape solution.
You need a philips type screwdriver, a scissor and alu tape.
It's easier to work with the tape when you remove the bulb holder.
It is not necessary to cover the bottom of the housing because it is almost fully masked by the bulb holder (no light to reflect).
With the installed bulb holder.
I prepared only the right side lamp, below you can see the difference.
You can also see a short video about the lamps in action here
Although the improvement is visible I am not satisfied with the result. I expected more, but I think this is because of the "far from optimal" geometry of the housing.