Quote Originally Posted by irishbud
I was goin to veg under the 4 6500k bulbs and flower using the 2 different watt red bulbs. i got the 2 80w bulbs just to have extra lms using just the 4 bulbs so it was more lms than when they were under the veg lights, are the 3000k lights not as good as the 2700k? is it better to use all the same type of bulbs for each stage of growth?
You can remove 80w or 1x55w expenses or you can use 4x55w and 2x80w for flowering. I'm sure you'll need to add some more light during flowering than you think, probably will en up like this

Examples:
First start with 2x55w 6500k. Plants will be small and nearly fit under those. Keep the bulbs close to each others so plants can get all the light. When they're bigger you can start using 2 more 55w 6500k and after a while start training (LST, SCROG, topping etc). After that you can separate the bulbs equally on top. Change two of this 6500k to 2700k spectrum and run 80w bulbs too.
You'll be using 2x55w 6500k, 2x55w 2700k and 2x80w 3000k for flowering.

Or,
If you're not going to use 6 bulbs for flowering then one of the 55w ballast is not necessary. Bulb is cheaper than a ballast.
Here 4 bulbs option:
2x55w 6500k
2x55w 2700k
1x55w ballast
2x80w 3000k
1x80w ballast
You can start with 2x55w blue for veg same as previous. When they need more light, add 2x80w and continue vegging (If you don't feel comfortable with using red spectrum for vegging then you can just buy extra 80w blue spectrum bulbs. Better than extra unnecessary 55w ballast and bulbs). When you feel ready for flower change 2x55w 6500k to 2700k and flower.

There are not big difference between 2700k and 3000k or between 6500k and 6000k. Nearly same. You can use as you think or mix spectrum however you like. More blue for vegging and more red for flowering. That's all you need.