These are usually known as "aluminium housed wire wound resistors" orI saw that it usual supplies at 25W, 50W 100W ...
So for my calculation I need:
WH50 7.5R 1%?
aluminum resistor is "WH"?
I have seen that it can be found in all sorts of names when the keyword "aluminum" is in everyone.
Is there a professional name for this component?
This is a 50mm long monster...
View attachment 45311
"aluminium cased wire wound resistors"
Inside aluminum heat-sink is windings of wire with resistance like light-bulb filament. So basically to get LED bulb to work, you're attaching in parallel incandescent light-bulb that generates 100% heat and no light.