I bought some dangerously cheap AC LED floodlights. Cheap flex, shoddy sealing, no screw terminal block, no earth continuity, etc... But the LEDs actually kick out a good light so I'd like to persist.
I have already rewired —and earthed— two of these and have mounted them on the house using their glued-in transformers. Now I want to run a string of these down a long stretch of fence panel. At least three lights, spread over a 40m (130ft) run from the house.
I could do that with AC but that requires armoured cable in the UK which is expensive. I'd like to see if I could power these from an external AC→DC power supply at the house end and running a little low voltage line out to the units in parallel.
My problem is I don't understand the output rating on this driver:
24-46V seems like a huge variance. My understanding was that most LEDs fub out with 20-30% undervolting. This is almost 50% and that seems mad.
And it also has serious implications on the voltage drop I'm going to get from the distance I'm running. 46V could go a fair way with a small percentage drop-off. 24, not so much.
But assuming you can make sense of this,
- What would you replace this with to power 3 of these over a long distance? 48V 5A?
- Is there any benefit to something more exotic like stepping down to unreferenced 48VAC and adding a bridge rectifier in each unit?
- What wire thickness would are you basing that on?
- These are going to be on fence posts. Should I earth these still?
- Any chance they'd be dimmable?