In the previous version of our photolysis set up (Let there be light entry) we were sticking the NMR tubes with our photoactive material in a fluorescent light bulb. The reaction took about 3-4 hours to go to completion. After rummaging around on the Amazon website, I found these LED flood lights which provide about four times the light as the fluorescent bulb. Some compressed air passed through some copper cooling coils helps keep the tubes at a manageable 30 deg C.
![](https://sites.uni.edu/chin/wp-content/uploads/2020/08/photolysis-1-1024x768.jpg)
![](https://sites.uni.edu/chin/wp-content/uploads/2020/08/photolysis2-1-1024x768.jpg)
Now the reaction is over in about 30 mins, and the new setup can hold 12 NMR tubes which increases the amount of material we can photolyze.