New CREE bulb design

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gar

Senior Member
Location
Ann Arbor, Michigan
Occupation
EE
151026-1408 EDT

CREE has a new bulb called 4FLOW. In soft white a 60 W replacement it is rated at 11 W.

The entire bulb is close to the shape of a standard incandescent.

What is new?. Most obvious is slits in the bulb to allow air flow to the LED(s). This is probably a much better thermal design.

I have not run any tests.

.
 
bphgravity said:
Go Here for a FREE white paper on LED dimming: http://www.nema.org/Technical/Pages/NEMA-Lighting-Systems-Division-White-Papers.aspx

Scroll down to the NEMA LSD 49.

NEMA LSD 49—Solid State Lighting for Incandescent Replacement—Best Practices for Dimming
Provides recommendations for the dimming and design of screw-based incandescent replacement solid state lighting products.
Click to expand...
It is free to download, but you do have to create a login account (also free) first. I have not gotten any spam or other annoyances as a result.
 
And you only have to do that once. From this point on, you can download any free standard, engineering bulletin, or white paper directly.
 
I saw the 'bulbs' off LED Edison base lamps and put a dab of rtv on the exposed 40Vdc terminals.

At 4ft off floor and bulb on 12 ft ceiling and 30 deg offset with cosine angle in measurement, get 12% higher measured lumens by removing 'bulb'.
 
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