i'm using d2c globes. simple plug in and play. no idea what's the differences are.
they all produce the same amount of light, just different colours are produced with different k's. the higher the k's the more blue/purple colour is produced but also the less the amount of cut is able to cut through rain/fog.
im running 8000k in my headlights, they produce very good lighting driving in good weather at night. but when i use them through rain and fog, standard ones are heaps better. the standard ones dont reflect off the rain/fog and just simple cuts through it. for example, drove through Melbourne fog one night with the standard and it was like normal, still able to see everything in front of me. drove with the 8000k, no chance.