There is a small junction box that is meant to be used.

See the following

eW Profile site

Install instruction

arcadianhome, goodmart.com, platt.com do carry them. Alternatively, your local dealer should be able to order the necessary parts.

Is the junction box the same profile (height) as the light box itself?

Also, do you feel that the 21" model will illuminate enough to be used in a 33" cabinet?

The junction box is much smaller.

If you want a continuously lit cabinet underside (at all levels), use a staggered arrangement (e.g. 21 + 12) to give the illusion. It would be impossible to fit 21" + 12" in a straight line anyway.

With line voltage bars the output will be higher, so it is not necessary to have the light bars joined end to end (in the case of low voltage bars)

Sorry, the box is slightly taller - 1.125" in height vs 0.88" for the bar.

It would be necessary to get the box + leader cable.

The track could make it easier to install /reposition things later

We're on a relatively tight budget, but I don't feel like messing with the LED tape light solutions (which are, as you know, cheaper). I'll be putting a 12" in each of two 15" cabinets as well. The two 33" are joined together (so 66" in total), and I though I could do two 21" (one in each) and if I wanted to later on I could add a 21" and just notch out the place where the cabinets meet if I felt the light wasn't bright or uniform enough. I'm just tired of sorting through all the numerous options. I figured I'd splurge a little on the philips system for now, and add another later if I wanted. Do you think I'll find this acceptable or should I just plan to order an addtional 21" or two 12" now?

Btw, Thanks a lot for the assistance.

Also, I guess I'll need 4 leader boxes then? Or should I just daisy chain the two 21"?

The line voltage wiring should be setup such that there is one cable end per cabinet run.

Each location that has a romex cable sticking out of the wall should have its own leader cable + box. The rest can be daisy chained from there on.

Just for an update. Thanks David! I spoke with a local showroom and they have everything stocked and matched all the online pricing. $462 after tax for my lighting solution. Thanks for your help!

Great! Thanks for the update.