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Inside a new Philips ultra-efficient LED lamp (with schematic)
2x2 148lm/W Glare free UGR16.5 23W LED Office Ceiling Lighting, healthy lighting, Customized LED Lighting: Tailoring Unique Solutions for Distinctive Spaces
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Philips' new 'Ultra Efficient' LED bulbs use 40 percent less energy
Philips Ultra Efficient lighting
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Philips Ultra Efficient lighting
28GC/LED/840/ND E26 BB 6/1, 929003508104
Direct Current (DC) Supply Grids for LED Lighting — LED professional - LED Lighting Technology, Application Magazine
Philips - 573667 - Ultra Definition Warm Glow Vintage 100W Equivalent Soft White A21 Medium LED Light Bulb (2-Pack)