The product concerned here is : 5M Led Strip LED Strip of 5 Metre with 30 LEDs per Metre.
The data sheet for the LED used : SMD5050
And I know(Not checked physically, just read) that TV USB are capable of providing 5V 500mA Output.
Considering only the RED Color LED what I understand is I can connect 2 LEDs in series since Voltage Drop(Max is 2.4) with a 10-30 Ohm resistor.
I can connect 25 such strips in series parallel to each other as Forward current of LEDs are 20mA.
That makes a Total of 50 LEDs only from the TV USB Power if I only intend to use it for RED colour.
How can they connect 150 LEDs to a TV USB Power. Am I missing something or Are they other ways to connect LEDs? Or do they put current limiting resistor of value thrice than needed to accomodate all the LEDs? Or is my calculation wrong?