Cave Light - what was it?

[WATU]

A Coastal Command ASW committee in July 1942 referred to a "Cave Light" with a theoretical range of 600 yards but maybe a practical range of only 300 yards. By context it was a lightweight competitor to the Leigh Light - an airborne searchlight for illuminating U-boats to allow night attacks. There is no obvious link with the Helmore/Turbinlite searchlight nor the later Pumpkin.
A Flying Officer Cave from 502 Squadron was a committee member. 502 was often asked to carry out trials of new kit. Two months before Cave had described his experiments with beam and forward ASV aerials and was clearly technically capable.
The Cave Light does not appear in the next few committee minutes nor in anything else I have seen.
Can anyone provide information about it please?

 

[A4K]

Never heard of this sorry, but interesting!

 

[WATU]

Never heard of this sorry, but interesting!

Exactly what I thought.

 

[A4K]

Maybe they put a headband on a mini Turbinlite... I'll get me coat...

 

[WATU]

Just spotted what the Cave light was about. F/O Cave locally tried a landing light on a Whitley and he considered that had the 600/700 yard range. That is very short to track over a target and there was doubt that it would achieve even half that distance. So it was not a dedicated light design as such but a clever experiment with a light intended for other purposes. It appears to simply fizzle out as being inadequate when compared to the Leigh Light and Turbinlite.