Edo, I don't need black tape, as there is a switch with 3 settings: left half only, all, right half only
If you rotate the LEDs ring on the lens adapter then you can use it also for upper or lower half of the LEDs.
For the finished models I prefer my light tent and/or the new outdoor setup, but for "quick during the build shots" the ring is very useful.
All 48 LEDs need 2A, a new battery set should be able to provide power for 2 hours. On the bench I can use the included power supply.
Cheers,
Frank