LDRs can have very large surface areas, and it is going to take a severe accumulation of dust affecting only one of the LDRs (both equally affected by dust is not going to harm performance) to cause you problems.
LDRs can have very large surface areas, and it is going to take a severe accumulation of dust affecting only one of the LDRs (both equally affected by dust is not going to harm performance) to cause you problems.