No real difference, the intensity of the light is the reciprocal of the
square of the distance. In short not much light will show on the plant.
Now if you were to cover the whole ceiling with the lights as well as the
walls, then that would be about equal to being close.

--
Joseph E. Meehan

26 + 6 = 1 It's Irish Math


"Andrew Ostrander" wrote in message
...
The idea that plants have to be so near the light source is rather
misguided. While it is certainly true if the light comes from one single
source point, it is less true when the light comes from a stretched out
source like the fluorescents, and is even less true if there is a bank of
side-by-side fluorescents, and even less true again if the light that
would
escape out the sides is reflected back to the plants. With good side
reflection the light is almost equally bright everywhere, regardless of
distance from the lamp.
"Beecrofter" wrote in message
om...
"rapdor" wrote in message
...
Hi folks, We are renovating our sunroom room which is 2m x 5m (6'
x
16') with full afternoon sun on the long side. Australian climate,
similar
to Florida. My question is, would it be beneficial to include (say) 2
x
1.2m (4') fluoro fixtures in the ceiling with Grolux-type tubes, or
would it
be pointless? Thanks for any replies.

Pretty pointless as plants need to be within inches of the tube to
benefit.
Might be good so you can see at night !