... engineers will compatible with optimum design to improve output and quality, increase the nutrients of corps and ... manufactures said their lamps have 10% more lumen output than standard HPS,contain a wider blue spectrum, 30% ... below:Very good result!!! isn't it? 400W with 60030lm output, that's true, it was tested ... by lamps' heat.If we increase the lumen output, the spectrum will decrease, that's the ...