Fig. 5.

The effects of LAN on glucose tolerance and locomotor activity depend on wavelength. Two hours of white LAN increased glucose concentrations (a, b), did not induce changes in the insulin response (c) and decreased total locomotor activity (d). Blue light did not affect glucose concentrations (e, f) or the insulin response (g), but decreased total locomotor activity (h). Green light exposure increased glucose concentrations (i, j), did not affect the insulin response (k) and decreased total locomotor activity (l). Red light showed no effects on glucose concentration (m, n), the insulin response (o) or total locomotor activity (p). Control (C), solid lines, black columns and symbols; LAN, dashed lines, white/coloured columns and symbols. *p < 0.05, **p < 0.01, ***p < 0.001