We have considered energy efficiency of two red-blue LED-based lighting systems prospective for use in horticulture. The first one used LED chips emitting at 455, 660 and 730 nm, and the second one was based on blue 455 nm chips and a red phosphor with peak emission wavelength of 670 nm. The research has shown that at equal emission proportions at the specified peak wavelengths, the chip solution was 5 % more energy.efficient at phosphor concentration of 1 %, and 8 % more efficient at 10 % of phosphor.