Measuring Florescent light output

[Stray59]

WOW - I can always count on Orchid Board members to come through! Whiterabbit, Naoki and blackvine to the rescue! I can really use all this info. I am currently using a blend of T12 (yes I know, almost useless, but it is what I have now), T8 and will soon be adding some T5's in the near future. In the past, the orchids I have had 'survived' in the lights I had, but now I need to move it up and get some blooms. Currently I have been able to bloom pescatoria under the lights I have, but have many Cattleyas, laelias, brassovola, etc. that I am moving out of the window sills and onto growth shelves. I also am deflasking seedlings for future stock / resale and need to make sure I am providing enough light for them to grow well. I will eventually have 4 distinct growing environments, each adjusted to the varieties that I grow. This is kind of a 'late in life' career attempt and hope all goes well with it. Keep your fingers crossed for me please!
Thanks to all of you for your input. I was basically housebound for 18 months due to a herniated disc and have focused on my orchids a lot. Currently I have about 125, all grown in window sills, of a wide variety of tribes.
Thanks for letting me blab on, but I want you to know you are really appreciated and the info you are sharing is truly assisting me in my new venture.
Have a great day, all of you -
Steve