|Model:||ES15730 30W low energy bulb|
|Wattage:||30W (29W Measured)|
|Tube Length:||280mm approx (8mm diameter), 4-U style|
|Bulb/Tube material:||Glass. Colour 827 phosphor coating on inner surface|
|Colour Temperature:||2700K CRI: Ra 82|
|Peak output wavelength:|
|Total light output:||1500Lm (50Lm/W) - Manufacturers claim.|
|Rated lifetime:||8'000 Hours|
|Operating voltage:||230-240V AC 50-60Hz|
|Operating current:||240mA (pf = 0.51)|
|Warmup/restrike time:||1 minute/none (Instant Start type ballast)|
|Cost (original):||£2.99 (May 2006) from "Nickel 'n' Dime" discount store in Aberdeen Market.|
|Place of manufacture:||Unknown, not stated on lamp or packaging.|
|Date of manufacture:||Unknown, no date code on lamp or packaging.|
These days, cheap CFLs are getting progressively easier to find, in the common wattages anyway (eg 11W - 20W). However, it seems that the higher wattages have eluded this market for the most part - not really surprising when you take into account what a small portion of the overall market they make up.
However, there are some out there if you dig around, this 30W example I discovered totally at random in a discount store when I was looking for, of all things, a box of paperclips!
Technically speaking, there isn't anything particularly special about this lamp, it's a very ordinary compact fluorescent lamp, featuring an instant start electronic ballast, and colour 827 phosphor.
The 8000 hour quoted lifetime sounds somewhat on the long side for a budget lamp, but this lamp does seem to run quite cool - a good thing, as what generally kills CFLs prematurely is overheating of ballast components. Regular switching of course would not help - but generally the problem with cheaper lamps is that the tube itself will last longer than the ballast. A far cry from the first magnetically ballasted lamps where the ballast would last effectively indefinitely, hence the evolution of lamps with a separate ballast/tube assembly.
|Click Thumbnails for full size images.|
This lamp added to the Virtual Display Shelf on the 6th May 2006 at 02:29.
26th January 2021: Minor page formatting changes to improve readability on mobile devices.