'''Light bulb''' is a [[period]] [[:Category:Oscillators with period 2|2]] [[oscillator]] that was found in [[:Category:Patterns found in 1971|1971]]. Its [[rotor]], known as the '''filament''',<ref name="pddict" /> is the only known 3-[[cell]] period 2 rotor, and it can be embedded in a slightly smaller [[stator]], giving the [[:Category:Patterns with 21 cells|21]]-[[cell]] variant shown below. Two other variants of this oscillator are also known.<ref>{{cite web|url=http://www.pentadecathlon.com/rotors/rotors.php?page=3 |title=Period 2 Oscillator Rotors |accessdate=March 16, 2009}}</ref> Various other small [[induction coil]]s can also be used in place of the [[snake]] at the top of the bulb, including [[house]] and [[bookend]], though these lead to larger [[bounding box]]es.

'''Light bulb''' is a [[period]] [[:Category:Oscillators with period 2|2]] [[oscillator]] that was found in [[:Category:Patterns found in 1971|1971]]. Its [[rotor]], known as the '''filament''',<ref name="pddict" /> is the only known 3-[[cell]] period 2 rotor, and it can be embedded in a slightly smaller [[stator]], giving the [[:Category:Patterns with 21 cells|21]]-[[cell]] variant shown below. Two other variants of this oscillator are also known.<ref>{{cite web|url=http://www.pentadecathlon.com/rotors/rotors.php?page=3 |title=Period 2 Oscillator Rotors |accessdate=March 16, 2009}}</ref> Various other small [[induction coil]]s can also be used in place of the [[snake]] at the top of the bulb, including [[house]] and [[bookend]], though these lead to larger [[bounding box]]es.

−

An {{gliders|7}} [[synthesis]] is known for a [[stator]] variant of this oscillator which uses a [[house]] instead of a snake for stabilization.<ref>{{citeCatagolue|title=lightbulb_and_cis-C|page=object/xp2_03lkl3zojc0cjo/b3s23|accessdate=May 24, 2019}}</ref>

+

A {{gliders|7}} [[synthesis]] is known for a [[stator]] variant of this oscillator which uses a [[house]] instead of a snake for stabilization.<ref>{{citeCatagolue|title=lightbulb_and_cis-C|page=object/xp2_03lkl3zojc0cjo/b3s23|accessdate=May 24, 2019}}</ref>