The price of any item moves in steps while the marketplace (supply/demand) price moves on a constant curve. This is because it takes time to react and make adjustments.
If you were willing to pay the higher price, then you must think the light was worth that price. If you want some money back, then ethically, it would be because think you made the wrong decision. :thinking:
Almost every retail store will give you your money back for the difference within 30 days, or refund the difference if you find a competitive ad in the same time frame. This is because they know people will go buy the new item, then take it back to them on the old receipt. All the consumer is out by doing this is gasoline and time, usually the money back is worth it. However, when postage is involved, the seller is not likely to find it worth the trouble. Plus there is increased risk in shipping and the waiting time.
Consumer is king, and you'll probably get your money back if pressed. In your shoes, I might send an email and at least ask. But I wouldn't bring it to the CPF community, because you might get backlash. Like somebody indicated, flashlight retailers are working on a slim budget and may give up their business of supplying flashlights to the community if they find their love for flashlights is responded to by the hateful side of consumerism.