Easy-to-assemble and inexpensive first DIY light?

Those cheap 9 LED lights are more like 30 lumens I believe - definitely not 100 lumens! Also, it hard to judge by lumens alone. A hard driven XR-E (i.e. Jacob A60) will only be about 300 lumens versus a hard driven XM-L light (i.e. P60 3A XM-L) at +/- 850 lumens, but you're comparing a thrower vs. a flooder. It's kinda like comparing apples and oranges.

Here's a thread with numerous lights tested including some Maglites.

-Garry