Linear LED tubes versus fluorescent lamps: An evaluation

Many manufacturers and distributors of LED tubes claim energy savings of 50% and more when replacing T8 fluorescent tubes with linear LED replacement lamps. Several distributors even pretend that the same visual comfort will be maintained after such a replacement. Optical and electrical parameters of twelve commercially available linear LED tubes have been determined and the evolution in time of these parameters has been monitored. Additionally, a case study is presented in which the fluorescent lamps in a small office room were replaced by LED linear replacement lamps in order to compare the illuminance distribution on the work plane, the glare perception and the overall visual appreciation. According to this study, it is clear that a one-to-one replacement of a classical fluorescent tube by a currently available linear LED lamp might have severe consequences on the lighting quality.

► Evaluation of optical and electrical parameters of LED linear replacement lamps and the evolution in time of these parameters.
► A one-to-one replacement of a classical fluorescent tube by a LED tube may have severe consequences on the lighting quality.
► The power reduction associated with a lamp replacement frequently results in an inadequate quantity and quality of illumination.
► A luminaire with a LED replacement lamp has a considerably different luminous intensity distribution.