Using a total of 15 piranhas white LEDs, each linked 50-ohm resistor. External with 5 V power supply, each LED current about 35 mA.

According to retailers that, piranhas LED rated current is 35 mA, the current large-scale application of decorative lighting in the area.

Circuit then good, probably because the installation is too dense, while current limiting resistors installed in the bottom of the LED, heat or timely dissemination. Preliminary estimates circuit temperature at 60 to 70 degrees, very hot, but you can touch, not scald. Circuit total power consumption of about 2.5 W, LED on the actual consumption of about 1.8 W power consumption.