Are you talking indoors with the lights on? Depends on how many lights you have on....my clear, internally sanded blades light up fine indoors under natural lighting, and even indoors at hockey arenas. The same can be said with my TCSS Trans-white blades. Outdoors is another matter entirely. On a sunny day, you can't see almost any blade light up, no matter what led you're using.
As to your second question, yes.
Sometimes, depending on how tight you roll it on the dowel, you may need to "reverse roll" your dowel inside the film roll to get the dowel to slide out.
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