Not using a radiator?

jonajohnson3

Commendable
Aug 24, 2017
158
0
1,680
Before you read on, I am making a 100w led and water cooling it

So i want to make a 100w led for very cheep.
Without any cooling I can get it down to 6.68$
With water cooling I can get it to 13.27$ with a radiatior
I want to know would I be able to use my set up without a radiator, like just using: water block, pump, and a bottle. Maybe use another water block and put a fan on that?
The led will get up to 250 deg F according to google

Lastly could i go without thermal paste or use really old thermal paste?

Parts: https://pastebin.com/7QapG2G9