Floodlight Pro suddenly struggles to light my yard

Have had Floodlight Pro installed for a few weeks now. For the first few weeks footage recorded at night with the built-in lights on were well lit and you could easily make out what was going on. Now, is barely lighting my yard at all. I've checked that both lights are coming on, and nothing in terms of its location or the angle it's facing has changed. I've uploaded a couple of pictures show before / after. How can I resolve this?