Emergency lights fed by two supplies

[DPG]

I have come across a similar situation to this and am looking for a suitable solution. The problem is with 2D fluorescent light fittings that are now failing due to age. Some of these 2D fittings are also emergency lights. They have two complete feeds (L, N & cpc for normal lighting and another L,N & cpc for charging the E/L battery).
I have not seen any replacements that cater for the two separate supply feeds. All LED replacement fittings I have seen cater only for single feed (L, Sw L, N & cpc).

Some background on the installation: A mid-late nineties installation I believe. Single phase supply to the building, RCDs on power ccts but not lighting.

Are the earths and neutrals not just connected together within the fitting?

 

[sxdave]

Are the earths and neutrals not just connected together within the fitting?

Hello DPG, thanks for replying. The earths are commons you would expect. I am not sure about the neutrals. I am not at the site right now but I have a photo of the terminal block in one of the fittings. In this photo the neutrals are not obviously connected although they might be connected elsewhere in the fitting.