The electrode leads look as if they may obscure the photocell. This could cause your problem.
No. I never thought of this. So should be OK to put the longer version in, I didn't realise you had a choice?!Have you tried the long photocell?
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local