Ds and now dd have a tiny little torch they put under their pillows,new thing for them as its a toy from Mc D but I thnk when the battery runs out I will be looking for something similar.
DD only gave up her night light last July when we moved house and I purposely couldnt find it, it was dim but I thought at almost 7 she shouldnt need it any more. Ds never had any kind of light in his room but recently as in last 2 weeks has started complaining about scared of dark and has come in to me at 5 ish ( v bad time) to go to loo. Since he has little torch he hasnt, if he goes to the loo which I dont think he has I have a light over the handbasin on, told him he can leave his door open a bit. He told me yesterday he was up during the night walking round his room !!! with his torch then went back to sleep. I dont actually believe him but.... he didnt wake me.
Long story short try a torch under the pillow