bumping ....

I'll take a stab at it, not knowing your dimensions or ambient/natural light sources. Also, are you going to have under cabinet lighting? (I highly recommend it for lighting the counters and because it looks pretty when the other lights are off.)

Coupla things:
1. IMO you'll want your sink lighting on a separate switch from the others. For work/prep mode you'll have the cans on; for party mode you'll probably want just the pendants (and under cab lighting if you have it) but also a light on for the sink.
2. I've lined up the lights with the paths from the entrances to the room; and of course lined up the lights with each other.
3. Different colors indicate separate switches.
4. Have you considered a pendant for over the sink? I think it would be pretty.
5. I'm assuming you'll have a separate hood light for the cook top.

Here is one with 6 equal lights in 2 paths. I would only consider this if you have an additional light over the sink:
{{!gwi}}

Here is one with 4 cans in the size you plan, plus 2 smaller ones for the sink. I would actually like this one PLUS a pendant over the sink. (I'm greedy that way.)
{{!gwi}}

Not knowing your dimensions and not being a light expert, I would recommend asking the electrician if these plans (esp. the second one) will adequately light the space. (For example, what's in the lower right of the space, and how is it lit? Plan 2 might leave that corner too dark.)

Hope this helps and maybe someone with more lighting expertise will chime in!

chicagoans - thanks for your input and the lighting design! I should have mentioned, the ceiling for the kitchen ends with the island. The kitchen flows into the sun room, which has it own lighting. I did think of a pendant over the sink, however since I'm going to have a 3 pendant hanging from the island, i didn't want to much overkill. The room is 15x9 (15 from sink to refrigerator) and 8 foot ceiling, however I think your first idea might work, just moving the lights closers to the doorway. Could you reposition the lighting for me, so I can show my electrician. Visual always help!

I just went through with this and it wasn't easy to come up with a plan.

Definately take this to a lighting store and get input. I went to 2. The plans each came up with were very similiar. Beware - the best laid plans often go to pot once you go to actually install those lights. For us, 95% of the cans were not placeable according to lighting store plan - joist fell right in the middle of every spot. We found an even better plan I love.

Here's what I would do based on what each lighting store told me. This would change according to your real life dimensions based on tips laid out below this:

1. place one a foot in front of the fridge
2. place one on each side of the range
3. place one over the sink and one on each counter beside the sink (3 in a line)

Do you need to light the area in front of the island? I didn't light walkway areas and was told not to. They said it's lighting the floor and unecessary.

Additional tips:
1. There is a formula that may or may not be an old wives tale, but I wanted to meet it regardless in case there was any validity: length of room times width times 1.5. That's how many watts you need for general illumination. So then take your bulbs - are they 50? Add them up. I have almost double what I need but fully customizable so I won't be using all at once unless I need a ton of light.

2. Find out what your lighting radius is from each bulb. My 50 watt par 30 halogens were 3.2 feet so I made sure any dead spots were in unnecessary places. Par 30 if you don't know refers to size of the bulb.

3. if you put the cans too close to the uppers, it will create hot spots on the cabinets. If you place them too far back, you will be working in your own shadow. The ideal is centered right over the counter edge.

I like needssometips' advice above. With that and now knowing where your kitchen ends, here are 2 more ideas.

In the first I centered the lights over the counter edge as per the recommendation above. But it still seems to me that you would want a light centered over the sink, so I did the second view also.

I like having a light on its own switch centered over my sink, but that's just me. This might be a good question for the Lighting forum.

As before, different color = separate switch.
{{!gwi}}

I like this better:
{{!gwi}}

needsometips08 - thanks! great idea, I didn't really put much thought into where they really need to be positioned. Thanks to this forum everyone has many great ideas.

chicagoans - thanks again for the layout. I like the second choice as well.

I have to check with the electrician and see if he's already assigned a light switch for all the lighting, otherwise I will have a separate for the sink. That sounds ideal.

we centered out 4" lights on the aisles. Also make sure you get the gimbal ones so that you can point them on the counter or floor or appliance or cabinet ...

pharaoh, could you send me a picture of your layout?