Accessory vs Power

[PK]

Originally Posted by DemiBenson

Accessory: Night-Vision Goggles
Nightvision (the advantage)

The former include No Peripheral Vision, Colorblindness, and several other drawbacks when used; see GURPS Tactical Shooting for details. They can also be overloaded. The latter just eliminates darkness penalties with no drawbacks whatsoever.

Accessory: Knife
A Melee Weapon Innate Attack
or
Accessory: Shield
Buying a Defense Bonus plus highly-limited DR

For both, the former is not GURPS-legal while the latter is. :)

Accessory: Flashlight
Control Light

I'll assume you meant Create Light.

The latter is powerful. Even 1000kW is enough to flood a cave with bright light lasting for minutes. You can cover every nook and cranny, bend the light to illuminate behind things, spot secret doors and passageways (by flooding the cracks with light), flash your opponents (weakly, but still), and so on. It's a super-power.

The former lets you remove darkness penalties in a fairly narrow beam in one direction.