I make use of a lot of voltage buckers or voltage boosters, and some combo boost/buck units.
I use the buckers mostly for dimming interior LEDS or slowing ridiculously powerful computer fans to tolerable noise/ ampdraw/airflow levels.
The voltage buckers I use have XL4005 or XL4015 chipsets, and are only rated for 5 amps. There are peel and stick small finned heatsinks which can fit atop these chips and keep them much cooler wen approaching their 5 amp limit, and the only failures not induced by unintentional shorting during testing, that I have had, are from the one I did not use IPA alcohol to wipe first and the heatsink fell off.
My 150 watt V booster can fit a 50Mm or 60mm computer fan bridging the heatsinks. Mine has exceeded its rating for a good while, unintentionally. Some models have voltage potentiometers and current limiting potentiometers. The 5 amp versions with current limiting pots have proven less reliable and efficient.
The 150 watt unit comes with large heatsinks attached to the transistors, with a 'sil pad' thermally conductive electrically non conductive isolator between transistor and heatsink.
There should be a thermal grease to help conduct heat from transistor to heatsink.
Often there is none, or very little, and adding some can help keep the transistor running cooler, , making the booster/ bucker/ combo unit more reliable for longer.
I have phillips XV +130 h4S in Hella 5X7 dot's .
I carefully removed all the blue coating with a razorblade.
Taking precautions knowing the bulb is under pressure. It takes about 10 minutes per bulb, and a 70% ipa alcohol wetted Q tip seems to briefly help lubricate the blade/bulb and perhaps also soften the blue coating a bit.
I'd recommend practicing the scraping motion on a hardwood dowel of similar diameter to bulb, and scrape only in one direction, or have at it on an old blown bulb. but do protect your eyes, and realize the pressure required is not much at all.
Not much downward pressure is required, and withougtgood eye magnification one might not see the sub hair thickness of blue scraped off.
Try to avoid scraping both directions, hold the sharp new razor blade at about 89 degrees, not digging
.
I'd recommend not using the thick HD inflexible razors made for box cutters and such, but use the more flexible single edge rectangular razors.
I've got two cross country journeys on these blue removed phillips xv+`130 h4 bulbs, with ~80% of those ~40 hour drives occurring after sundown.
I assume that if My blue scrapings damaged the bulbs, they would have failed by now.
I also have the ability to manually control charge voltage with a dial on my dashboard, and a 12awg relayed harness. My bulbs rarely are allowed less than 13.4v and many of those hours they've accumulated so far, are at 14.4v.
I can dial it higher, but if I go 30 seconds at higher than 14.79 volts, my check engine light comes on.
My dial is a ten turn bourns potentiometer, and changing voltage quickly does not happen, and my eyes/brain can just barely perceive the brightness difference when I lower battery voltage from 14.7 to 13.7v, or visaversa.
Voltage reaching bulb is ~ 0.3v less than battery voltage, last I measured.