The sandwiches that Wayne sells are VERY bright. Of course, how bright depends on the bias of the converter that you order.
The MadMax used to be my favorite converter, until the NexGen came out. The NexGen is a constant current converter and gives you a flat output.
Make no mistake, these are worth the price. The only problems you'll have is making sure that no one steels it. I give modified mini mags with sandwiches as gifts on a regular basis. I get many orders for replacements when they disappear. Once they get used to using one, they can't live without it.