I have the X10 PR511 and Leviton 6417 (which are slightly different functionally) floodlights installed all around my property. I installed them in 2009 and they were discontinued not too long afterward. As I remember, I had to replace one right after the warranty expired and it was difficult to track down. Now one of my 6417s occasionally does a "rapid-fire" of its appliance switch when switching on or off, so it won't be around much longer.
I've thought about what it would take to replace a single PR511 with something nearly identical in functionality, and I've come up with:
- A third-party floodlamp assembly
- XPFM inline fixture module to switch it on and off
Then, for motion options, one of the following:
1. For ALL FOUR motion addresses but no dusk/dawn detection:
- Third-party PIR motion detector with a generously adjustable time delay for contact closure
- Power supply for PIR motion detector
- XPT3 and four diodes
- Enclosure for above
2. For ONE motion address and dusk/dawn detection (but only 1 dusk/dawn address, not 4):
- MS16A ActiveEye Motion Detector (and batteries)
- TM751 Transceiver Module (since the RR501 is no longer available)
3. For ALL FOUR motion addresses AND dusk/dawn detection:
- All items from options 1 and 2
What a mess!