I'm looking to add an occupancy sensor switch in a staircase that has a pair of 3way switches.

The power source comes in at the light, then goes to the switches, see Diagram:

http://www.howtowirealightswitch.com/wp-content/uploads/2014/09/two-lights-between-3-way-switches-power-via-light.jpg

The main issue I've been running into is that all occupancy switches I can find needs either a Neutral or a Grounding conductor, both of which are not in my switch boxes (and not in the budget to be added).

Reading up on the post below I noticed UMS-OPS6M-DV that says it only needs a 25w load to run.

Is there a motion sensor light switch that does not need ground?

What does this mean exactly? My LED lights run a Load of 18w total...

1. Will 18w work, if not I can increase the bulbs
2. Does this minimum load mean there is always (let's say) 25w being always used to just power the switch? Or why does this minimum exist?

I'm looking to add an occupancy sensor switch in a staircase that has a pair of 3way switches.

The power source comes in at the light, then goes to the switches, see Diagram:

http://www.howtowirealightswitch.com/wp-content/uploads/2014/09/two-lights-between-3-way-switches-power-via-light.jpg

The main issue I've been running into is that all occupancy switches I can find needs either a Neutral or a Grounding conductor, both of which are not in my switch boxes (and not in the budget to be added).

Reading up on the post below I noticed UMS-OPS6M-DV that says it only needs a 25w load to run.

Is there a motion sensor light switch that does not need ground?

What does this mean exactly? My LED lights run a Load of 18w total...

1. Will 18w work, if not I can increase the bulbs
2. Does this minimum load mean there is always (let's say) 25w being always used to just power the switch? Or why does this minimum exist?

I'm looking to add an occupancy sensor switch in a staircase that has a pair of 3way switches.

The power source comes in at the light, then goes to the switches, see Diagram:

The main issue I've been running into is that all occupancy switches I can find needs either a Neutral or a Grounding conductor, both of which are not in my switch boxes (and not in the budget to be added).

Reading up on the post below I noticed UMS-OPS6M-DV that says it only needs a 25w load to run.

Is there a motion sensor light switch that does not need ground?

What does this mean exactly? My LED lights run a Load of 18w total...

1. Will 18w work, if not I can increase the bulbs
2. Does this minimum load mean there is always (let's say) 25w being always used to just power the switch? Or why does this minimum exist?

I'm looking to add an occupancy sensor switch in a staircase that has a pair of 3way switches.

The power source comes in at the light, then goes to the switches, see Diagram:

http://www.howtowirealightswitch.com/wp-content/uploads/2014/09/two-lights-between-3-way-switches-power-via-light.jpg

The main issue I've been running into is that all occupancy switches I can find needs either a Neutral or a Grounding conductor, both of which are not in my switch boxes (and not in the budget to be added).

Reading up on the post below I noticed UMS-OPS6M-DV that says it only needs a 25w load to run.

Is there a motion sensor light switch that does not need ground?

What does this mean exactly? My LED lights run a Load of 18w total...

1. Will 18w work, if not I can increase the bulbs
2. Does this minimum load mean there is always (let's say) 25w being always used to just power the switch? Or why does this minimum exist?