Conventional methods of measuring light for humans use lumens, deemed useless for horticulture, horticulturists measure light in micro moles (µmoles). Working with British, German and Dutch horticulturists and researchers I have learnt that micro mole measurements are the best indicator we have at this time. The results from real world tests indicate that a plasma lamp, that measures 30% micro moles 'less' than a High Power Sodium Lamp of same wattage, produces at least 30% more biomass, and can fully grow cucumbers to European standards 10 days sooner. After eating them myself I can confidently write that in my opinion cucumbers grown in continuous full spectrum light with a low PAR value, compared to HPS, have better aroma, flavour and colour. My hunch is that the nutritional value will be far higher also, especially as thinking it will be the same is disregarding the principles of logic!