All right, so as promised here's some pics and a little history of a very rare light I was lucky enough to pick up recently.
Pharo-Tech / Luma-Tech started the whole re-chargeable flashlight market. They originally produced conversions for stock Kel-Lites and L.A. Screw lights that added NiCad Batteries and a special end cap along with their wall mounted charger. In 1979 they developed the first specifically designed rechargeable flashlight. It was manufactured in conjunction with Kel-Lite but unfortunately only 35 units total were produced as prototypes to gauge interest in the market. This is one of those original 35 produced. Kel-Lite stopped production shortly after and was sold to Streamlight where Streamlight worked to develop their own SL-20, the first commercially available rechargeable flashlight. These Pharo-Tech rechargeable lights were produced in extremely small numbers and were never commercially available but nonetheless are an important part of flashlight history and served as the proof of concept for most flashlights that are around today.
This light is shown below with a first gen 2C Kel-Lite. It is longer than a 2C but shorter than a 3C. It is likely cut down from a 3C to fit the special 4 cell NiCad battery pack.
This light also has a ceramic base Halogen bulb. It has no writing or stamping on it and I haven't seen another like it.
Mine is missing the cradle charger but a pic of it can be seen in the Norm Nelson estate collection at:
http://kellite911.blogspot.com/ about half way down on the page along with some early sales literature.
Shown below is this prototype Pharo-Tech along with one of the most special lights I own, the prototype of the Mag Charger. I have a couple 2nd gen SL-20s also but I've never been lucky enough to find a 1st gen.
I also have a long long write up about early rechargeable flashlights on both my blogs at
http://otherflashlights.blogspot.com/2017/08/streamlight-sl-20-and-early.html and
https://maglitehistory.blogspot.com/2017/07/1980-prototype-mag-charger-and.html