Manufacturer: Megaman
Model: Clusterlite HC01060i 60W E27 3000K
Application: General Lighting where high lighting levels are required
Wattage: 60W
Diameter (max): 60mm
Length: 195mm
Tube Length: 680mm (approx)
Bulb/Tube material: Glass, warm white phosphor coating on inner wall
Colour Temperature: 3000K.
Peak output wavelength: N/A
Total light output: 4000Lm (Manufacturers claim).
Rated lifetime: 15000 Hours
Cap: E27
Operating voltage: 220-240V AC 50-60Hz
Operating current: 270mA
Warmup/restrike time: 1 minutes/none (approx 0.5 second preheat before lamp lights)
Cost (original): Unknown
Value (now): GBP 30.90 from BLT Direct (Correct at time of writing)
Place of manufacture: Unknown
Date of manufacture: Assumed week 39, 2008 based on date code 08W39 on lamp.
Lamp Status: Working, new.
Notes: While in terms of light output there are now CFL's which can match up to 100W incandescent light bulbs commonly available in every big supermarket (especially now that 100W incandescents have disappeared from our shelves for good), those larger than that are less common.  If you want a LOT of light, you're still limited to a few options:

High wattage incandescent lamps - though with huge amounts of heat to deal with and very high levels of power usage which need to be taken into account.

Metal halide discharge lamps - Excellent colour rendering in the case of the better lamps and with a small source which is easy to focus into a beam using a relatively small reflector.  However there's a downside in that the lamps and their associated control gear are very expensive.  Many of the compact lamps require fully enclosed fixtures as well.

Blended mercury lamps are the only real option which doesn't require any external control gear - though these don't offer any real advantages over halogen incandescents other than in terms of lifetime.

However there have been a few high power compact fluorescent lamps which are worthy contenders - Megaman in particular seem to be pushing products such as that pictured here - which is aimed right at the high power incandescent or 100W metal halide market.  While it's a lot bigger than a 100W metal halide lamp, in the same breath, it's quite a bit smaller than most 300W GLS incandescent lamps.  Compared to both of the above however, it's a lot more user friendly...not requiring any external, bulky or expensive control gear, nor does it double as a space-heater.  All you need is a mains supply, an E27 lampholder, and some means of pointing the light where you want it...which doesn't really need to be anything fancy unless you want a tightly focussed beam.  If you do want that, you're going to need a truly massive reflector due to the large emissive area of the lamp, so you'd probably be better looking at metal halide lamps.
If however you're looking for a nice even floodlight, then you're in business, as that's what CFL's are good for.  So long as you've got the tube itself shielded from direct view, this thing will easily light any normal sized room to quite an impressive level in a nice glare-free manner, while only using 60W of power.

Make no mistake...this thing for all it's not as massive as the Saverlamp 85W lamp which currently holds the record as the largest CFL I own...puts out a lot of light.  The packaging states that it's capable of giving out 3000 lumens, and while it's hard to judge this without having an integrating sphere - I don't reckon it's far off based on my own rather subjective measurements.

One characteristic of this lamp which I noted it seems to share with quite a number of modern CFL's, especially some of those using narrow bore (T2 in this case) tubing, is that when it's initially switched on that it starts out really quite dim relative to its full output - thankfully given its high rating that's still on par with a 100W incandescent, so unlike some of the low wattage examples, one of which a friend of mine used in their hallway meaning that when you flicked the switch on walking into the dark house you were greeted with a dim pinkish glow barely better than a couple of candles for the first five minutes!  The power dissipated in this lamp means that it warms up pretty quickly as well I'd say it's as near as warmed fully up after a minute as makes no difference.

I suspect that at least part of the reason that a number of compact fluorescent lamps of late have been subject to low initial output levels is somewhat due to the ever decreasing amount of mercury which lamp makers are including in the burner in the interests of being environmentally friendly.  Interestingly, Megaman in the case of the entire Clusterlite range have dispensed completely with the liquid mercury dose, instead using an amalgam, apparently a mercury alloy which is actually a solid at room temperature.  While safer in environmental terms, this does mean that the mercury vapour in the lamp is likely to be too low for optimal performance when it's first turned on.  The level of paranoia surrounding the mercury content of such lamps puzzles me somewhat anyway...while there is indeed some liquid mercury in most CFL's, it's present in such a tiny amount that even bearing in mind how many of these we go through in a year - I rather doubt that it's a terrible environmental concern - it would seem to make sense to me rather than to panic over it, to set up the necessary schemes to ensure that used lamps can be properly (and readily!) recycled...that way you avoid the problem of mercury escape by making it available to lamp makers for use in a new lamp, therefore reducing their costs and requirement for raw materials as I believe it's possible for phosphors to be recovered as well, everybody wins.

Speaking of phosphors, the box for this lamp states that its colour is "warm white."  It's not quite as warm white as you might be used to for general home lighting however.  Warm white tends to imitate normal (non halogen) incandescent lighting, with a 2700K colour temperature.  3000K is actually a bit more of a neutral, slightly less yellowy white.  It's still warm - and fits in well with halogen incandescent, but it's visibly whiter than most incandescent lamps or colour 827 CFL's which may be undesirable in some locations.  For use in areas where a cooler, more daylight-like colour temperature are desirable, there's a 4000K cool white version also available.

The 15,000 hour lifetime quoted on the packaging sounds impressive, and is right up there with the HID alternatives.  One very unusual feature of this lamp is that it actually consists of two discharge tubes and two ballasts - both rated to 30W.  Assuming that these ballasts are powered independently, this should allow one of the tubes to continue to operate even if the other has failed, though obviously this would result in a drastic drop in light output.  That drop in output would hopefully be noticed by someone, and result in the lamp being replaced before it failed completely.  For areas where lighting is a safety-critical matter, this built in redundancy and clear indication of impending failure could prove very useful indeed.

One thing which I did notice about this light was that the high power dissipation in conjunction with the narrow tubing results in a very high wall temperature near to the electrodes, reaching well over 140 degrees Celsius in normal operation.  You'd definitely want to make sure that curious fingers were kept clear of this when in normal use.  I'd also hope that there's the appropriate protection circuitry built into the ballasts to ensure that the lamp is shut down at the end of the emitter life - as continued operation beyond this point can lead to a drastic increase in the wall temperature around the electrodes, result in cracking of the tube even in relatively low power lamps.  

The ballast in the case of this lamp does properly preheat the electrodes before striking the discharge.  This is a feature which I like to see, as it can greatly increase the life of lamps which are regularly switched on and off.  The ballast in the case of this particular lamp I've also noted does make a little noise, nothing objectionable, just a very soft purr, strangely reminiscent of the noise made by the magnetic ballast in a Philips SL*18 or SL*25, albeit quite a lot quieter.  It's by no means objectionable, but I like to be thorough, and make sure that you know about these things.

It's definitely an interesting lamp, and brings very high lighting levels easily within the reach both financially and practically of the general consumer.  While GBP30 or so may seem a high price for a light bulb - if it then lasts you the next ten to fifteen years of normal usage...it's not that expensive, 2-3 pounds per year in fact, and if you're comparing to a 300W incandescent, the savings in terms of power will mount up quite quickly - based on our current electricity prices, saving very nearly its own price in the first year (assuming 3 hours of operation a day).  As these prices seem to be spiralling out of control at the moment, that payback period is likely to decrease.  This is in sharp contrast to the lower power lamps where the return period in terms of energy costs can approach infinity in some cases.

All in all, a very interesting lamp I think...now just to go and find its big brothers.  Megaman I've discovered also do 80W and 100W versions like this, and 120W, 200W and an eye-searing 320W version with an external ballast...I might need my sunglasses when testing them.
Click thumbnails for full size images


This lamp added to the Virtual Display Shelf on the 30th August 2009.

Page completed and uploaded on 5th September 2009.


References: Lamp packaging, markings and manufacturers datasheets.


Acknowledgements: Many thanks to the website reader who donated this lamp and many others for display!


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