It's ok, not too late to make your own Halloween lamp! Several choices available, it depends on the materials you have, your devote time and, of course, your wishes... Hope you will find some inspiration.
1. Nice, original and customizable Halloween tombstones, perfect for your garden!
2. Handmade witch hat pendant lamp
3. Customize your old desk lamp into a bat one ! or whatever...
4. Amazing bottle glowing liquid Lamp
Amazing!! AND, fast, easy and cheap! See the complete tutorial here
5. The classic Halloween hand-carved pumpkin lamp
Necessarily be original? Classic Halloween pumpkin is always much appreciated and you will find many tutorials on the net...