You can use a two cup method so long as you carefully monitor the water level to make sure it drains well enough. Don't let the soil sit in standing water, pepper roots don't like soggy soil.
They may move their leaves trying to get more light. This is especially common sitting next to a window instead of having a good/strong overhead light source. You asked for light suggestions but it is unclear to me whether you want to move these outside later. If so, you won't need nearly as much lighting (area). Any well stocked hardware or lighting store should have standard T5 fluorescent fixtures which are the most cost effective. You need at least a two tube fixture but 4 tubes (or 2 x 2 tube fixtures) would be better, though I don't know the total # of plants from the pictures). Then decide whether to splurge on special spectrum grow light tubes for it or just use standard "cool white" 6500K color temperature tubes. The more (most?) cost effective fixtures are T8 size, 4' long like this:
http://www.homedepot...e&storeId=10051 Of course in either case the light would have to be hung from chain or support wire, or mounted on a frame. A ready made grow light fixture may include these at a premium price.
Another alternative is standard spiral CFL bulbs in whatever fixtures you want, perhaps around 100W to 200W total from multiple bulbs so there is good coverage over top of all sprouts. Again a hardware store sells them but you'll have to wire them yourself. Suggestions for a more professional lighting solution are beyond me, especially in Belgium, but you will need even more light if you intend to keep these indoors any longer than another month of good growth.
I don't know how long your growing season is so I cannot answer how big a pot is big enough. Generally it would be better to have at least a 5 gallon pot per each plant, but given a shorter time between waterings and adding fertilizer, they can be grown in smaller pots. That plus the late start the plants are getting, might allow 2 gallon pots to be big enough. In the worst case you might have to transplant them into bigger pots later.
They may move their leaves trying to get more light. This is especially common sitting next to a window instead of having a good/strong overhead light source. You asked for light suggestions but it is unclear to me whether you want to move these outside later. If so, you won't need nearly as much lighting (area). Any well stocked hardware or lighting store should have standard T5 fluorescent fixtures which are the most cost effective. You need at least a two tube fixture but 4 tubes (or 2 x 2 tube fixtures) would be better, though I don't know the total # of plants from the pictures). Then decide whether to splurge on special spectrum grow light tubes for it or just use standard "cool white" 6500K color temperature tubes. The more (most?) cost effective fixtures are T8 size, 4' long like this:
http://www.homedepot...e&storeId=10051 Of course in either case the light would have to be hung from chain or support wire, or mounted on a frame. A ready made grow light fixture may include these at a premium price.
Another alternative is standard spiral CFL bulbs in whatever fixtures you want, perhaps around 100W to 200W total from multiple bulbs so there is good coverage over top of all sprouts. Again a hardware store sells them but you'll have to wire them yourself. Suggestions for a more professional lighting solution are beyond me, especially in Belgium, but you will need even more light if you intend to keep these indoors any longer than another month of good growth.
I don't know how long your growing season is so I cannot answer how big a pot is big enough. Generally it would be better to have at least a 5 gallon pot per each plant, but given a shorter time between waterings and adding fertilizer, they can be grown in smaller pots. That plus the late start the plants are getting, might allow 2 gallon pots to be big enough. In the worst case you might have to transplant them into bigger pots later.