Thanks I've no use for the signalling mode either so not that bothered. The only way I could see it being of use is if I wanted to leave a beacon somewhere so could get back to it and don't see that as being very likely.
BUT in the blurb about it one gets if they click on the picture on this web sites home page it refers to an 'undocumented feature' to run it at half power in all modes. I can't find the instructions to do this on the Photon web site which it links to.
qjs