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Use an infrared stovetop heating element and power it properly . Use a dimmer switch to control intensity and a fan.
You can’t magnify the heat of the lightbulb. It is what it is. You can use Mylar to redirect the heat ie space blankets or potato chip bags. You could add more lightbulbs to increase the heat. Maybe a string of Christmas lights (the old kind not led) . I would just buy an enclosed oil radiator heater on amazon for $80...much safer