Hello again, So I guess nobody has information about this subject. So perhaps I can ask a simpler question. Those of you that grow South African bulbs under glass in the Pacific Northwest (and I think there are a few of you out there!), do you add extra lights to compensate for our low light levels in the winter? thanks a lot, Sarah On 10/17/2016 12:30 PM, Sarah Hinckley wrote: > Hi folks, > > Here's a geeky question: what light levels (in lux or footcandles) are > necessary to grow winter flowering South African bulbs? I am growing > these in a greenhouse in the (sometimes) gloomy Pacific Northwest > winter. The bulbs I am growing are various Moraeas, Geissorhiza > radicans, Lachenalia aloides, Sparaxis tricolor. > > (plus Eucrosia mirabilis from Ecuador). > > Today, a cloudy and rainy day, the light level at about noon is about > 4400 lux. Kinda low. > > I do have two big sodium halide greenhouse lights (250 or 400 w), plus > various smaller shoplights with plant lightbulbs (CFLs up to 250 w), > that I could use to supplement the light levels. > > Any recommendations? > > Sarah Hinckley > > Enumclaw, WA > Zone 7a >