It wasn't all strains and it was quite a few years ago now when we were all talking about what worked best, different strengths and different time cycles etc. I had a quick look and the thread looks like it's been edited a bit, maybe now the method and strengths are sorted out it doesn't matter as much but there was a lot of talk back then about HPS being better than LED for making VIABLE pollen. For anyone having trouble it might be worth a go
I'm unable to "like" posts here as I'm new by the way