I recently purchased a Dusk-to-dawn outlet sensor (https://www.amazon.com/dp/B00002NB2X?ref_=pe_2640190_261118450_302_E_DDE_dt_1), but I'm wanting to convert this thing into a Dawn-to-Dusk device instead! Why you ask? I bought a plant light for our living room that I want to only be on when the sun is up, because the room all of our houseplants in is north facing, so there is very little light in there.
Seems like it should be a fairly easy 'mod'. Tinkering with it, it looks like this thing is using a Photocell Resistor to control the SPDT relay. When resistence is low, the relay 'opens', when it is high, it 'closes'. Someone on another forum said that you may want to replace the photocell resistor with a photocell transistor or photodiode? Does this sound like the right way to go?