How restructured are halogen heaters? are they the best way to find instant heat? Anyone ever compared...

are they the best way to find instant heat? Anyone ever compared dynamism cost to heat produced. I know little more or less this subject but want an efficient low cost warmth source for short periods.
What are the pros and cons of have...
Answers:    They will administer you the same amount of grill as a normal furnace. IE a 400watt oil bursting radiator will give impossible to tell apart heat as a 400watt halogen space heater. The difference is that the halogen heats up without beating about the bush but cools down the same. A grease filled take time to reach fry but takes time to cool down.A admirer heater heat up quickly but will blow the heat air around.
My Grandmother give me her babylock sewing contrivance....
resourcefully lets a moment ago say they table lamp up da room