Brighter dome light bulb?

The stock bulb is a 578 number.
I can't find any brighter replacement in a regular bulb.
I'd like to stay with a bulb because I believe LEDs don't fade out.
I changed the map lights to some super whites and got rid of the yellow.

 

I have a 48 LED domelight...The dimmer functions still works perfectly...
Here are some pics:




and here is the link where you can get one:
http://motors.shop.ebay.com/merchant/bliss-star?_nkw=48+led&_nd1=&_fromfsb=&_trksid=m270.l1313&_odkw=&_osacat=0

 

Is that very bright?
I'd go with white.
I don't want it too bright.
Good to know the dimmer works.

 

This is a very bright dome light...
The pictures above where taken in the day time, and only the dome light was on...
by the way, they come in either red, white, or blue...