Fræðaþing landbúnaðarins - mar. 2011, Síða 337

VEGGSPJÖLD | 337
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From the results it can not be recommended to use LEDs. The lower energy cost
cannot justify the decrease in yield.


We thank Umhverfis og Orkurannsóknarsjóður Orkuveitu Reykjavíkur (UOOR) for
their support of this research project and LbhÍ staff for their assistance.


Bula, R.J., Morrow, R.C., Tibbitts, T.W., Barta, D.J., Ignatius, R.W., Martin, T.S., 1991. Lightemitting
diodes as a radiation source for plants. 26: 203205.
Hoenecke, M.E., Bula, R.J., Tibbitts, T.W., 1992. Importance of ‘blue’ photon levels for lettuce
seedlings grown under redlightemitting diodes. 27: 427430.
Kim, H.H., Goins, G.D., Wheeler, R.M, Sager, J.C., 2004. Greenlight supplementation for enhanced
lettuce growth under red and bluelightemitting diodes.  39: 16171622.
Pinho, P, Nyrhilä, R., Särkkä, L., Tahvonen, R., Tetri, E., Halonen, L., 2007: Evaluation of lettuce
growth under multispectralcomponent supplemental solid state lighting in greenhouse
environmement.  2: 854860.
Yorio, N.C., Goins, G.D., Kagie, H.R., Wheeler, R.M., Sager, J.C., 2001. Improving spinach, radish,
and lettuce growth under red lightemitting diodes (LEDs) with blue light supplementation.
 36: 380383.