Why the hurry to purchase this particular light? You do know if you wait you'll likely get either a better bin LED for the same price, or the same been for less?
My advice is just wait until you have the cash. Like others said, you already got $35 somehow. Sooner or later some way to earn a little money will cross your path. As a bonus, after waiting a bit you may find that the urge to buy this particular light will pass. This is really the reason I never make impulse purchases. I can do so easily even though my income isn't all that great. I have two charge cards and enough savings to buy virtually anything short of a house or a luxury car at this point. Yet despite that, every time I something I simply wait a bit. Sometimes I'll wait for the price to come down if it's something technology related (prices on such items inevitably fall when the next version comes out). Other times I'll see if I can get it for less on eBay. Usually however I wait just to see if I really want it. 99 times out of 100 the urge passes within a week. If I'm still thinking about it a month or two later, then I assume that means I really want it. Then and only then will I consider buying, and I'll still hunt like crazy for the best price. First rule of good finances in never buy anything at retail price. As a result of this policy, I only have things I really want and not roomfuls of clutter representing wasted money like lots of people I know.
BTW, lots of ways to earn small amounts of cash at your age even if you're unable or unwilling to secure conventional employment. Mowing lawns, shoveling snow, raking leaves all come to mind as things I did at one time or another to earn a few bucks. If you're good at fixing things then you can offer your services there by word of mouth. That might actually be a growth industry these days as people short of cash seek to repair old appliances and such rather than buy new ones.