An increasing problem - how will I measure the increase?

[011443]

In the project "How light-emitting diodes fade as temperature increases", the flashlight is supposed to fade when temperature increases. However, the temperature varies if I do it on different days, and there's no way to measure it. Should I just put a side note on my scientific report that it changes, or do it all in one day (pretty long probably) ?


[Administrator note: Project url: https://www.sciencebuddies.org/science- ... -increases ]