simone

i don't know if this will work for you but it certainly worked for us.

when my first dd was around the same age she used to be scared of all sorts of "creatures of the night" so we went to the $2 shop and i got her a special "magic bottle" it was just a lovely purple (her favourite colour) spray bottle, i explained to her it had special powers and we would squirt the magic through her room at night so she could be safe and have sweet dreams. when she wasn't looking i filled the bottle up with plain water and added a couple of drops of lavender oil. each night we would go and "spray" her room, it worked an absolute treat, in fact i remember her running into my room the very first morning after we used it and she was so happy saying mummy the magic spray worked, there were no monsters in my room

my ds is 5yrs old and insists on having the hall light and his bedroom light on before he goes to sleep, i just turn his light out before i go to bed, but leave the hall light on (a really low wattage like 20 watts) this is mainly for him to be guided to the loo for his toilet trips and also for me to see where i am going to replace the baby's dummy

good luck i can totally recommend the "magic spray" - get your son involved in picking the colour and style maybe even put some special stickers on it just make sure he doesn't see you filling it up cause these tricky little kiddies can click on pretty quickly lol