IVE made a diy light using 16 individual 30 WATT(300 WATT EQUIVALENT) 10 are 3000k 6 are 5000k. At 18" it puts out over 1200 ppfd and my plants grow fast and healthy as any light I've ever bought . Nice work
@Grow_Shack_Kev, the 4 E27 I have now are 4000k and 13W so a total of 50w. That particular set up has some definite PPFD hotspots but that works fine for plants in different stages. The bigger plant gets 600ppfd and the cuttings around 100.