5000K @ 157 lm/watt is available on USA mouser but in 1150 mm length. These are good but hard to find to find a heatsink that long. these 1050mm are i think 33 watt each
4000K is the max i have seen for the 300mm strips.
I would not worry about 600m strips as it is same as 300mm just led are spaced apart. 525mm strip is 21v and drivers for 21v not common.
They are available at mouser.com and digikey.com. You can lookup on chipfinder if you the exact Manufacturer Part No: L235-xxxxxxxxxxxxxx
I think any heatsink with some fins or decent width will do just fine since 300mm strips are 11 watt each only.
http://www.ebay.com/itm/High-Power-...597?pt=LH_DefaultDomain_0&hash=item4ae3a2033d
This heatsink reached around 50 degree Celsius. A little hot to touch but then 50 is fine for passive i guess.
I thought about this heatsink since it has a reflector but at $9 each is a little high. I still might try one to see if the sides can focus beam better.
http://www.ebay.com/itm/3x-Long-Aluminium-Heatsink-Cooling-for-4-x-3W-LED-Reflective-/331542331614
Not sure if you in USA. I Bought 1.813" Wide Extruded Aluminum Heatsink from heatsink USA and its good for upto 2 or 3 strips in parallel.
It is $0.66 /inch, custom length and would be a good choice if you choose 1050mm strips.
I like this option too
http://www.homedepot.com/p/Everbilt...inum-Angle-with-1-8-in-Thick-801747/204273988
For up to 2 x 300mm strips = 22 watts i recommend $12
Meanwell GS25U18-P1J , at
http://www.onlinecomponents.com/mean-well-gs25u18p1j.html?p=11952126
I currently use this to power my strip.
Search ebay for 'DC12V Power Plug Adapter Connector'. This will work with your meanwell 18v power supply of most other 18v power supplies. they also also available in Y configuration (1 female to many male)
For more than 2 strips, connect 2 strips in series, that way you need 36volt power supplies. Plenty of meanwell options for 36Volts. These 36 volt supplies good for 1150mm strip too.
I was not able to find the Phillips driver that salmonetin recommended.
They easily stick to heatsink. Good to clean heatsink before installation. I soldered my connectors. remember to secure the wire so that if the wire pulls it does not break off the connector. So far i did not have any luck with the IDC connector,
@Abiqua was trying the IDC connector too. Another good thing is the LED are spread across length so even light, not hot and it can get close to plants and not harm them. 300mm strip can be cut in 100mm pieces. 1150mm strip can be cut into 395+295+360 pieces.
@Abiqua i don't know much about HPS
600 watt hps. Assuming 4x4. one 1150 strip on each side. 33w*4= 130 watts of around 150 lm/watt. = 20,000 LED lumens along with 600w HPS sounds like an overkill ?
May be this is more reasonable for side lighting.
300mm on each side 11*4 = 6000 lumens
2x 300mm on each side 11*8 = 12000 lumens
Good luck
PS: back to roadtrip wont back for another week.