Seedleranswered grow question 5mo ago again i can just say download photone, google cannabis DLI chart and you find a whole page, with every stage of cannabis on how high the DLI (daily light integral) should be. And just go for this. Thats the safest and easiest mwethod and you will develop a feeling for how dimmed and how high/low the lamp has to be, to have a good DLI for seedling, veg and flower. Don't forget to slowly increase DLI
Good luck