Most of them Kush lines aint pure indica unless we are talking Hindu Kush/Master Kush, Northern Lights is about pure indica but Sensi costs too much for my blood I think you can do better for less Ortega from Mr. Nice is NL x NL #5 almost pure indica pretty good packs are bigger and at their auction you can get them seeds cheaper than KC Brains. From seedbank I wouldn't even buy Mr. Nice but I may have Jew blood in me. lol, It's just so much cheaper with their auction.
Also you want pure Sativa Nevilles Haze ain't pure but it's probably more pure than you want they got better options on the Sativa side IMO but some love that shit just 16 weeks is some bullshit. You don't want pure sativa indoors they don't do as good as hybrids. But pure were talking Dr. Grinspoon, landrace Thai, etc. outdoors equatorial their great not so much with artificial light.
But you only got 1 400 watt light? Don't be mixing indica and sativa lines in the same grow it will be hell sativa's stretch like a bastard while indica's stay short I wouldn't even do a 50% haze like Mango Haze with only 1 light some stretched more than others so the taller ones got their own light and the shorter ones got their own light you could do them under 1 light but you would need to train the bigger ones to get the canopy more reasonable.