Luma,
If you want to longest
throw possible, you'll have to do a couple things
1) Take the switch off the tube
2) Remove screw & dome piece.
3) Add 1 washer at a time to the lower round plastic piece. Put screw directly back on without the dome piece. If you don't get power, add 1 washer at a time until you do. This will give you the longest throw/movement. You can find those flat washers at Lowes/Home Depot or I'm more than happy to send you a few (you should have gotten 1 with your kit which is used for if/when you
batteries get dented and you need to lengthen the switch.
I can also take a picture for you so you get the idea of what I am talking about.