Reply to "Under The Hood: LED Bulbs in a Lionel 153 Signal..."

Lou NOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBERMEMORIAL SUPPORTER

RailRide posted:
RJR posted:
You could slip copper tubing over the bulb so light only goes straight out.
Being an LED, doesn't most of the light already go straight out in a relatively narrow cone?
---PCJ

No not necessarily. An LED die actually emits light from all 6 sides. It is the lensing that focuses the beam.

I have a project at work that uses LED die for a photodynamic therapy device, an implant that stimulates a pharmaceutical that is injected. The printed circuit board is transparent so light comes out both sides of the board.

Lou N

3/4/177:22 PM

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