Actually, the question wasn't about turning it on, or getting it to, but about the glow. I think the idea was that the person has a white core and nothing else. They should probably build a new lightsaber, and make sure they have the latest DirectX drivers and the latest video card drivers installed on the lightsaber, and a decent engine for rendering.
A really ******* good video card, like a GeForce 9,000,000,000... would probably help.
I need a new sig...