A stylish decoration that can be used for both Halloween and Christmas would be lighted green topiary. These are great in entryways and can be used year long. During Halloween, bats and pumpkins can be hung from branches. While during Christmas, simple colored bulbs or other ornaments will show the seasons spirit.
The Christmas Tree shop offers Christmas decorations year-round at very reasonable prices. Seasonally, you can find some great lighted decorations at places like Target and Walmart.
There are many places to look when purchasing lighted christmas decorations. You might look at localized specialty shops, thrift stores, wal mart, target, and other craft or hobby shops.
If you'd like lighted Christmas decor for inside, you could try Amazon.com. For outside lighting and decorations, christmaslights.com has a great assortment of lighted Christmas decorations and they have great savings on many of their items.
The Peanuts Lighted Window Decorations do not come with replacement bulbs, but they use standard mini-bulbs, which are readily available locally.
It does not say how it will mount.
Sometimes people use Christmas outdoor lighted decorations for Halloween because they are versatile, like the white lights. However, it is quite tacky to use decorations like reindeer/Santas so I advise against that.
Lowe's does carry lighted decorations, but they focus mainly on outdoor decorations. If this is what you are looking for Lowe's should have a wide selection available for purchase.
The houses lighted Christmas decorations was so ravishing and entrancing that I had to stop and take another look.
My favorite place to find modern Christmas decorations is Target. Their decorations suit the modern style. You can also find decorations from Martha Stewart at Kmart.
You can find origami Chrisrmas decorations. You can find origami Christmas decorations at www.origami-resource-center.com/christmas-ornaments.html. These Christmas decorations are not too hard to make.
Whenever I'm doing design work I like to use Google images. Go on the Google home page and click on images and enter Christmas lighting and decorations.
Halloween and Thanksgiving are often interchangeable. Some of the more generic decorations include the horn-of-plenty, pumpkins and gourds and turkeys.