A standard DVD is rated at (approxmately) 4.7 GB and a D/L is again, approximately 8.4 GB. So I am a little perplexed as to what you are attempting to do and with what. A little more info might be of help.
Light bulbs you shouldn't buy
There are plenty of dimmable LED light bulbs, but make sure you don't buy the ones that flicker when you dial them down.