Sounds interesting  , it would be cool to work in LED filament tech, and try out different phosphor combinations to try and recreate discharge colours!
Although the current LED filament phosphor they use in 2700, 4000 and 6500 all have their own unique colour in a way! 

In fact, with enough motivation, this can be easily done at 'kitchen level'

Start with a blue filament lamp with uncoated LEDs, then mix you desired phosphors in a clear silicone, and put the mix on the filaments. Voila.

I did custom coating in neons, that involves glassworking, burners, vacuum manifold, bombarder etc, here everything is done at room temperature without any specialized equipment. Probably some effort is needed to evenly disperse phosphor powders in silicone before coating.

Laser tech - which is not a DIY thing - can also create many different monochromatic colors. The latest of Braniac made me think of mercury's yellow spectrum line pair: https://youtu.be/0TG7qjn5QE0

I hung up my T12s along the ceiling and wall of my room. Aesthetically it can look quite nice once i hide the wiring and the ballast. However, it does not do what i want it to do, which is create a daylight-like effect in my room in the daytime, lessening the gloomy corners of my room when outdoor light starts to get blocked by trees.

Meanwhile, what's running over there is the 80w HPL-4 Pro - a Deluxe 3400k long life HPMV lamp.  This very much does what i want it to do. So in the end, i might have to drill more holes in the concrete and move the T12s...

Not sure how to exactly arrange them, though. Perhaps it has something to do with the low surface brightness and how all the light is spread out, instead of being a strong point source like the HPMVs?

Perhaps it would already be enough to move the T12s more towards the little window - because of the shadow of the shelves, that whole area remains mostly unlit. But that's quite a lot of work, taking stuff off the shelves again, drilling new holes... Maybe i should just put the 20w Caddilac tube in that open space there.

I bet you need some kind of indirect lighting on the ceiling to create a daylight effect. Light source is of your choice - from CMH uplighter to some shielded high-CRI LED string.

It’s that time of year again, check out my gallery for another old trade ad.

Today I found this philips 40w incandescent on the roadside. There was a public toilet nearby which used a 60w version of the same thing.

Yesterday, I started an experiment where I dipped two cfl top halves in sanitizer to remove the tubes from the plastic top. Today I found out that it worked!

Checked out the fluorescent lamp aisle of the diy store again. It's finally happening - their final stock is in the store. Only Philips 18w 830 and 840 fluorescents left (for €1,60 a piece!) and a bunch of Sylvania Circline stuff which is allowed to remain in production a year longer. Possibly because our national railways use circline lamps in their station clocks, but idk.

https://nl.aliexpress.com/item/32761452139.html

Ordered a pair of these SB "fluorescent" lamps. I wonder what i'll get when they arrive!

These just arrived. They are stamped in chinese 'Minghua Yaming Ballasted Fluorescent Mercury' and HY-GYZ-125w.

One of them looks in good shape, the other one has an impact mark in the inner coating of the balloon, from the filament holders impacting it. This is because the whole filament/arc tube assembly is melted into the balloon at a slight angle, compounded with some shocks it has received in transit. Do not expect any semblance of quality control with these things. Price-quality wise it's fine, for less than 30 euro including shipping from the other side of the globe, and in a fairly short time, i'm not complaining about that. Things would be different if i were to buy one locally, from a well known brand.

The packaging was excellent. Sturdy double corrugated box with thick layers of bubble wrap around the lamps, which are shipped without their boxes. Probably for the better, as they would likely be able to rattle around in those boxes.

I was already trying to figure out what the coating is exactly. It appears the same as the coating in my recently bought halophosphate 530 lamps spectrum wise. But the color's different and i just haven't figured it out yet. The 530s i bougth are also very different from what i'm used to, spectrum wise. Color wise they're similar to my older lamps. I had already written down a bunch, and then decided it warrants its own forum or gallery thread with spectrum pictures and such. Not gonna do it right now, too late at night for that.

Who knew that in such mundane things as light bulbs, there is so much to discover.

Checked out the last surviving REVO, 135watt SOX, Hyperion A, in my neighbouring town of Northwich, whilst out to get some wiper blades for the car, sadly its gone now, replaced with a CRT SLX2 
This was probably the last working SOX lantern in Northwich and was quite rare today!

Bought an osram HQI-TS 70w lamp in cool daylight colour. Weird shape!

I'm going to be installing some cobra-heads this weekend...

 For yourself or someone else ?

It's for my dad...he currently has some HPS yard-blasters installed. Going to replace them with ITT/American-Electric S13's with drop lens and FCO optics. I converted them to CMH using Philips CDM70/U/PS/4K, and CDM150/U/PS/4K Master-Color lamps...and of course new ballasts. It's time for beautiful
white 90% + CRI lighting!