On-off lighted archery arrow nock apparatus

Apparatus for controlled lighting of an archery arrow nock, said arrow nock mounted to a tubular metal arrow shaft, said nock having a slot having an open end and a base end, said apparatus comprising:

• a plunger mounted in the base end of said nock slot, said plunger having an outer end having an LED light bulb visible through said nock slot, and an inner end connected to a micro switch;
• a battery holder, containing a battery, mounted in said arrow shaft;
• said battery electrically connected to said switch and said LED light bulb;
• means to normally bias said plunger to a first position toward the open end of the nock slot;
• said switch being in the "closed" or "on" position when said plunger is in said first position, thus completing a circuit between the battery and LED to illuminate the LED;
• such that when the arrow is mounted onto an archery bow, the presence of a bow string within the nock slot will push the plunger inward toward a second position, said switch being in the "open" or "off" position when the plunger is in the second position, thus de-energizing the LED.