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LED lamps: lumens = wats * 80, old_wats = lumens/10 = wats * 8
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2x e14 2-4W (100-200 lumens) => Era LED Standard R39-4W-827-E14
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10x e27 6W (480 lumens) / 100-108-115mm long => Era LED Standard B35-7W-827-E27
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2x powerful 800 lumes (10W) - 1440 lumens (18W) => Era LED Standard A65-19W-827-E27 / A65-21W-827-E27
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- Some cheap series may have long starting time (up to couple of minutes to full brightness, e.g. Philips Eco) or some flickering (e.g. Era Eko)
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- There is different forms (and areas of light shedding, areas near the base are normally do not emit light in LED lamps). It is important to select
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form helping to direct light stream and to avoid getting bright lamp directly into ones eyes.
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* E.g. P45 is smallest bulbs which might sit well inside lustre or other type enclosure protecting eyes from direct light
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* R63 might be better suited to have a wide distribution of light from the working lamps (as the bottom shading the light is broad)
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* On the other hand, some lamp forms might be better suited to shade light backward (toward plinth). It can be useful in some lustres.
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- The last point is further strengthened in fillament lamps. Normal LED lamps has leds concentrated in a single place and normally light stream is
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directed. Fillament lamps have LED more widely distributed and often emit light in all directions like old incandescent lamps. This again might be
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- <3000K - warm yellow light for cosy atmosphere. But low contrast and will tire eyes if working
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- 4000K - 5000K seems preffered for office settings, seems similar to natural lighting
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- 6000K+ blue light, may be also good for office settigns. To be checked.
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- LED lamps: lumens = wats * 80, old_wats = lumens/10 = wats * 8
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Small fillament lamp (or at least with wide angle), preferable for Yerevan lustres: Philips ESS-LED-6.5-75W-E27-840-P45ND
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* Cheaper variant (when direct viewing on lustre is unlikely) Era LED Standard B35-7W-827-E27 (6W / 480 lumens)
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Work lamps: ??? Philips ESS-LED-7-70W-E27-4000K-230V-R63, Philips ESS-LED-7-70W-E27-6500K-230V-R63 ?
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Powerful 800 lumes (10W) - 1440 lumens (18W) ??? E.g. Era LED Standard A65-19W-827-E27 / A65-21W-827-E27
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Low-power in bedroom: e14 2-4W ??? E.g. Era LED Standard R39-4W-827-E14