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by ksec
2956 days ago
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I was about to back to Halogen Lamp, and I was hoping there are improvement to Halogen Lamp then anything else. Are there any Consumer LED Products, that offer High CRI 95+, may be with less UV since that should be less indoor, Long Life, Little degradation on CRI and Lighting over time, and more importantly NO / Zero flicking? I have been asking and thinking, assuming all our electricity is green and cheap, why would I want a LED over Halogen Lamp? All the problem I have, which I absolutely hate and drive me crazy are colour inaccuracy and flickering. Both of which are non existent to Halogen Lamp. |
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Not really true. The fancier halogen lamps (e.g. MR16s with reflectors that pass IR) have CRI below 100. Halogen lamps do buzz, especially when connected to a dimmer. (Many halogen lamps are 12V, too, and most of the transformers also buzz.) And they all flicker — the power delivered to the filament is roughly sinusoidal at 120Hz, and the thermal mass is low enough that there is a good amount of modulation in the light output. IIRC it’s about 30%. It just so happens that the residual 120Hz modulation is low enough that it doesn’t affect most people.
A crappy LED driver modulates much deeper than 30% at 120Hz and might even modulate at 60Hz. A good LED driver doesn’t.