Interestingly, with fluorescents due to their geometry, it's closer to a simple (first power) inverse except at the ends of the rows. > -----Original Message----- > From: pbs [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of Fred Thorne > Sent: Thursday, November 05, 2015 7:46 PM > To: Pacific Bulb Society > Subject: Re: [pbs] Growing under lights > > Using a light meter is an important part of growing under lights. > Understanding the The inverse-square law for light will aid in your > placement. > > -----Original Message----- is an important part > From: Jane McGary > Sent: Thursday, November 05, 2015 11:04 AM > To: Pacific Bulb Society > Subject: [pbs] Growing under lights > > I have no experience growing tender bulbs under lights in winter, since at my > former house there was a solarium where I could keep many plants frost- > free. Now I have a small (but very convenient) house, and the only place to > overwinter plants is in the garage, where a former owner installed a tall, > sturdy workbench with a fluorescent light fixture above it. I recently replaced > the common sort of lamp with a modern fixture intended for growing plants, > purchased from a neighbor who is closing down his indoor growing now that > his "crop" is legal in shops here in Oregon. > > I just moved my tender plants onto the bench, but I'm not sure whether all > of them will tolerate the light level provided. Many are South American and > South African, both monocots and dicots, and I'm sure they will enjoy the > bright light, but I also have some of the less hardy Cyclamen species. Should I > shade the latter? I think Cyclamen persicum is probably as light-tolerant as > Cyclamen graecum, which grows well for me in full sun, but I know Cyclamen > creticum grows in woodland. I don't know the habitat of Cyclamen > rohlfsianum. > > I was going to move a pot of Hyacinthoides lingulata (formerly Scilla) indoors, > but it's doing so well in the unheated bulb house that I left it on the covered > patio. PBS member Paul Otto recently photographed this charming fall- > flowering bulb "taking over" a raised bed in his garden on the southern > Oregon coast, where most winters are relatively mild. I have seen leaf > damage on it after freezing, but the bulbs survive. I may add some next > summer to the area under large Douglas firs now planted almost entirely to > Cyclamen hederifolium, if I don't think a mass of blue, pink, and white will be > a little vulgar. > > Advice on the Cyclamen species will be welcome. > > Jane McGary > Portland, Oregon, USA > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/