Dying Synsepalum dulcificum

I cant help thinking its got too cold at some stage.
But as said, I'd give it a chance, it could come back in the spring.

I'd not bother with lights, if its got no leaves they are pointless, just keep it at room temperature and on the dry side, until spring and warmer weather, along with stronger sunlight.

 

I think young foliage stays on in winter , as with several other species.

I don't know what these are! But Pete's advice is spot on!

 

Time ago I went a club in London where before ordering food they where serving magic fruit pills , it was amazing , bread and meat taste like sugar and sweet food taste salty.....I was curious myself about this berry , apparently is really addictive and the plant it really sensible to temperature chance.....I`m not surprised if the plant has died , it can even be from the roots getting wet and cold , seedling are really delicate and far as I remeber I never had a seedling come back from dead, if the roots are damaged the plant is doomed , plus is a tropical that dasn`t need to ibernate in winter .
I agree with pete , brown leaves on = dead plant

 

No nutes

 

If you want an update

I put a ziploc bag on-top of the pot and just snipped a hole at the top so some air could get out. I left it on-top of my vent for several days... and! There's new life coming out.

Not too sure what plant it may be, but it was new soil from a bag, and there was no other plant that was in that pot before.

So maybe its starting again?