[Spatial distribution of light intensity with a phototherapy halogen lamp]

The spatial energy distribution under a phototherapy unit fitted with a special halide lamp (ex. Hereaus, "Photo-Therapie 800") is particularly uneven, with a pronounced decrease in energy towards the edges. With a correct positioning of the child in the centre of the luminous cone however, the energy of the effective light is still distinctly higher than that received from a phototherapy unit fitted with 6 blue fluorescent tubes (Philips 20W/52 BAM blue). With the addition of lateral aluminium reflectors, not only is the effective energy intensity increased, but also the spatial energy distribution becomes more even, so that a very exact positioning of the child is no longer required.