I got my Nashbar Brilliant 5 today. I don't think it's significantly bigger than the EL400. It's really pretty small.
I think it's bright enough to ride by in a pinch. Being used to HID I wouldn't WANT to, but I think I could safely ride with it. It throws a nice main beam, fairly tight but not overly so, plus a few rings of peripheral light.
I took some pics but since the HID is my only other light, it's kind of like comparing a match to a campfire. There's so much difference that it makes the LED light look really worse than it actually is.
I think next time I do a Nashbar order I may pick up a couple more of them, to have around for the kids bikes or to give to friends who are thinking about night riding. At $18 and palm sized, it seems like a very reasonable gadget and a good backup light that's easy to carry around.
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Work: the 8 hours that separates bike rides.