its the kind of bulbs in your cars turn signal
I drive a 40+ year-old 6x6 Army truck, there is not a single LED in sight of the thing.
If a comment says "1156 Leds" or even "1156 Led bulbs" that means (to me at least) 1156 LEDs, not a single assembly with X number of LEDs.
Remember you are asking for help from engineers or at least people with an engineering mindset, as such when we see a magic number like that we ask if you really intend driving 1156 LEDs. If the comment was "Will control 1000s of Leds inside" or "Will control a shit-load of Leds inside" I may skip over it until you post again asking why your Arduino dies when you turn the LEDs on.
What's the significance of the number 1156?
Rob