A blonde light is basically a bigger version of a redhead. Power rating can be 1000 to 2000 watts, although the term generally refers to a 2000w open-face unit.
These are powerful lights, useful as key floodlights for lighting large areas.
The example pictured here is an Ianiro 2Kw blonde.
Note: The term "blonde" is often used loosely — there is no rigid definition.