| General > General Technical Chat |
| colour temperature of bulbs |
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| Simon:
the overly bluish light is not always comfortable, I would think the multicoloured lights are more pleasant, we shall see when the price drops |
| TrentO:
I recently purchased a 7w (single) LED lamp as a trial, and found the light way too harsh for hobby use-- there is a very blue-white spot surrounded by a 'whiter' ring-- and the transition is very sharp. I think LED lamps make perfect sense for flashlights (torches,) where you would want a high intensity spotlight, but every-day purposes, I definitely prefer the more diffuse light from my full-spectrum CFL's. I use my LED lamp as a night-light-- I use it to light my living room to keep the monsters away. -Trent |
| Simon:
we have led torches on the portable phones at work, they are awful when trying to take a photograph thats how non standard light they are. the camera completely ignors the ligtt from these torches, whereas my ordinary torch is fine for adding a bit of light to photographs (usually the insides of a radiator) |
| Zero999:
I wouldn't even use white LEDs as a night lamp because they produce too much blue light. The problem with blue light it it destroys your night vision: If you need a night light, then I'd recommend a longer wavelength yellow, orange, red etc. Blue light does have the advantage of being more efficient at low light levels: the dark adapted eye is more sensitive to blue light but that's what creates the problem. |
| qno:
I once used an USB microscope that was equipped with extra white LED's to inspect and photograph PCB's. The PCB's where the green epoxy type but the camera made it look a completely different color due to the LED's. The burned traces where also difficult to distinguish. |
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