I have got a type of new strip, called dc12v GS8208 individual pixel led strip,it can be easily used in many equipment devices or led projects. and the current of dc12v strip will be much lower than the dc5v individual led strip as the ws2812b it is not so higher temperature and more safety. but anyone have the experience about it with the arduino controller? for the T1000S is not enough for the timing programs. Videos about the DC12V GS8208 LED Strips
It makes no difference if you select an LED strip that works on 5V, 12V, or 24V as to the voltage delivered to the individual LED that makes up the RGB pixel. If you look closely, you will see tiny resistors built into the strip that drop the voltage to the required amount. So, there would be no difference between the temperature of the pixel in any of the three voltages.
I have bags of individual 3 and 5mm LEDs for DIY projects and the highest voltage is for white which is 3.7V. It varies with the color of the LED. I also have bags of 1/10W resistors to use to match the voltage to the source (usually 12V but sometimes a single 18650 battery - 4.2V max or series battery holders with multiples of that voltage).
The one I saw on eBay uses 9W for every 30 LEDs (that assumes all three colors are lit at once). It is an SMD 5050 LED strip. Most RGB 5050 strips without the IC specify a 60W converter for 300 LEDs on a 5m strip.