Some time back someone asked me,
I just want to find some way to make an RGB bulb spot light as tight a beam as possible for my Disco ball ?
Here is a BIG 10mm Bulb LED being Squeezed into a tight beam by lens to just a spot 10 feet away.
Step 1: What Is a Fresnel Lens
- A neat device to bend light
- Usually Round Glass or Plastic
- Increasingly useful through our racial history
- Big glass Lenses are Heavy
No need to be alarmed... In the hand pic #4, I have all four fingers. The Lens edge does not see my little finger.
Fresnel plastic lenses are flat and light enough to snail mail a whole 10½ inch square lens.
Step 2: RGB MR16 LED
MR16 Lamps in discreet restaurants and bars are a favorite localized lighting.
Here is an RGB LED array masquerading as an MR16 providing a multitude of color effects.
Step 3: Holding Plastic Fresnel Lens
Using forcep clamps made in Pakistan to hold the 10½" Sq Fresnel by two corners.
Several colors of the LED MR16 Lamp compressed to a small circle 8 feet distant.
And No...... the Fresnel is obviously not color corrected.
Step 4: SINGLE LED ACTION
NO FRESNEL NEEDED
Aim a single 10mm LED powered from a Cadillac Light Thief at
the glass refracting globe fourteen feet away.
The LED is a 15º dispersion angle and covers a ten inch globe
without using a Fresnel lens to focus a tighter beam.
Step 5: REFLECTING GLOBE
See the Globe in the light of a Single LED.
Just a few pictures with-out using a Fresnel aiming lens.
I used this glass globe in place of a Disco-Ball.
Placing a DISCO - BALL in the center of a 30x30 foot dance floor
Illuminated by assorted 10mm narrow dispersion LEDs will
give you 900 square feet of dancing lights to enjoy :-)