T8 Fullspectrum Sun Lights (orange pkg)
 

Hi Im new to the board..

I just recently bought two 18 inch t8 Full spectrum (noonday sunlight) GE fluorecents (they come in an orange packaging from home depot). I have set them up about 1 1/2 feet away from my orchids...

I have 2 oncs, 2 phals, 1paph and 1 dend.

Is this enough artificial lighting for these plants? the rack they are on are also in front of a west window.. so they do get some sunlight about 2-4pm...

Just curious if anyone has used these fluorescents.. i bought them since they say that they have full spectra and mimic noonday sunlight.

any input on this would be appreciated

There are several here that use t8s. I think most use the 48" versions however. They really don't put out enough light for Oncidiums, but Phals and Paphs are great candidates. 18" is probably too far away. Why not spring for a decent light meter like Light Meters, 840006,840020,21,22 (I use the 840020 Lux/Foot-Candle meter) and you can tell for sure. Other than that you are just guessing at the output for several reasons. What about reflector? What about condition of bulbs? What about distance? There are just to many factors to allow guesses. If you are serious about growing any sort of plants (orchids included) under lights, you need two things - a good light meter (like the above) and a good pH meter to check on pH of the solutions you are delivering. This is a different discussion, discussed here many times, do a search.

Welcome aboard and I wish you success in your growing. Ask away if you have other questions.