There are 1 or 2 areas which are still using incandescent bulbs they are also a rather smaller 25W equiv wattage.  These mini bulbs seems to provide the lumens required, are they OK just that the bulb physically smaller? 

https://www.bunnings.co.nz/philips-4w-led-warm-white-bc-mini-bulb_p8910337

I also not these are a lot bright giving 900 lumens can these smaller bulbs replace more standard bulbs?  If they are behind a light fixture .... 
https://www.bunnings.co.nz/philips-a60-b22-led-900lm-warm-white-9w-globe-4-pack_p0131914

Many thanks :)