Most hunting spotlights have LED (Light-Emitting Diode) bulbs as they last very long and cost less. Performance is also good enough with LEDs, case example being those best Q Beam spotlights. They could be as bright as 10,000 lumens.
But, in terms of energy efficiency or brightness, LEDs cannot compare with HID (High-Intensity Discharge) light. These can burn brighter, but consume less power than LEDs. Unfortunately, they don’t last very long.
For hunting, though, I prefer halogen lamps.
Halogen lights are warmer in temperature (redder). Like I said, animals have difficulties registering reddish lights. As a result, halogen bulbs are less likely to startle the animals than the bright white beam of LED or HID bulbs