[niko]

BassMan,

If you don't want CO2 then the safest bet is to use lower light. I would suggest a single 54 watt Giesemann Midday T5HO bulb. It's 4 ft. long. If you are handy and can DIY it will cost you about $80 for bulb + reflector + ballast + cord.

The Giesemann Midday bulb is not exactly low light despite what the wattage suggests. With the reflector installed it can provide enough light to read a newspaper about 30 ft. away from the bulb. So another option is to use a Normal Output T5 - T5NO. Here in Dallas I can buy the 28 watt 4 ft long Sylvainia 5000K T5NO for only $5 each. The ballast is about 15.

Keep in mind that mosses grow under crazy conditions. How does 6 months damp (no other water) in a ziplock bag on the window sill sound? And it grows. So, knowing that don't try to hit the mosses with a lot of light.

For plants other than mosses it would be best to get any kind of Java Fern.

--Nikolay

 

[niko]

Bulb:
http://www.reefgeek.com/lighting/T5...00K_Midday_Sun_T5_HO_Fluorescent_by_Giesemann

Reflector:
http://www.reefgeek.com/lighting/T5...t_Reflector_for_1-54W_Bulb_by_Sunlight_Supply

Ballast (This ballast is made for PC bulbs but works for one 54 watt bulb. If you need more look at the other ballasts in the same category - next one up is Workhorse 5 (for 2x54 watt bulbs):
http://www.reefgeek.com/lighting/Pa...ompact_Fluorescent/Workhorse_Long_3_by_Fulham

Or this is a ballast made for t5HO:
http://www.reefgeek.com/lighting/Pa..._T5_High-Output_Ballast_by_Universal_Lighting

End caps:
http://www.reefgeek.com/lighting/Pa...ture_Proof_End-Caps_(Pair)_by_Vossloh_Schwabe

If you will be using screws to attach the waterproof end caps to wood for exam;e It's easier to mount the caps using these mounts:
http://www.reefgeek.com/lighting/Pa...for_Vossloh_Schwabe_End-Caps_(Pair)_by_IceCap

Or these much cheaper but non-waterproof end caps:
http://www.reefgeek.com/lighting/Pa...cent_Twist-Lock_Sockets_(Pair)_by_AAG_Stucchi

Cord:
http://www.reefgeek.com/lighting/Pa...rescent/Powercord_w!_Grounded_Plug_(6_ft)_by_

Wiring diagrams:
http://fulham.com

--Nikolay