It is t5. That's the wedge base socket. The top part, or "light" bulb area is wat changes. Some r a panel of LEDs, some just have the 1 led, some have 3 led in all sorts of configurations. The STD t5 tho that isn't an led will just be a normal filament bulb on top of the wedge, again sizes vary a little in terms of the filament but t5 is the size that fits dashes, there is a t10 but that won't fit in a dash