no-one ever can veg under too much light, but so much isn't really need to get the job done. it is like with firepower, a bit more fells always lot more comfortable, well depending on what end you end upAm I vegging under too much light? I've got 2 - 100 watt fluoros (10,000 lumen each) and 8 - 23 watt cfls over 12 plants. They are short, stocky, thick leaves, and the nodes are stacked one on top of the other.