That’s 1500 lumens less than the average commercially available standard glove box flashlight.
I’m not an expert, but I have studied this a bit. I have bought those little leds and I have wired them series / parallel, about 100 of em, and powered them with an old adapter.
A 26 watt cfl gives about 1600 lumens.
50 watt / 4000 lumens is pretty good.
There are other units of measure, such as millicandelas.
There are also other factors, such as the directionality of the beam.
I doubt that a commercially available standard glove box flashlight would give 5500 lumens. 5500 of something else maybe.
People who follow LEDs, and I do, a bit, watch very closely how many lumens per watt an LED gives. The good ones do over 100 lumens a watt. Crees are apparently the best, they’re breaking records left and right, but it takes a while to go from the lab to the store.
LEDs are more efficient than CFLs which are more efficient than incan.