It looks like a great setup.... however from my limited knowledge, 6500k leds would be better. I'd be interested to see how it goes to be honest, I'd think if the LEDs are really 4w (true 4w) then the ceph might be ok, but the sundews would be too shaded. I've used 3w cree 6500k leds (futureeden seller on ebay) and 5 of those worked well in a very small tank over some sundews.
For my 'big' highland (orchids and a couple neps) tank I went back to using t5 bulbs as it was easier to get the setup I wanted.