Was about to start a new thread, but saw this not-quite-zombie was revived today.

Wife bought this 2-pack from Big 5 yesterday, sale price $8, so $4 ea. For that price, I sent her out to nab another 2-pack, she got the last one just before closing.

They seem pretty light, and pretty bright. Haven't attached to my helmet yet to test out, but at $4 a pop, not much risk. Even regular price of $15/2-pack seems quite a good value. These seem definitely bright enough for be-seen lights, they do red and white, blink and steady. They claim 20h runtime, if that's max runtime at blink, then maybe not so good, but with rechargeable AAAs, recharging them maybe 1-2 nights/week, could work.