Contributed by: VenuS
Submitted: August 24th, 2004
2004 Adding Glass Shields to HPS
1. First of all, you'll need a Reflector
with HPS of course I think that way of adding glass will
be suitable for many kind of reflectors.
[Editor's note: Venus has used a batwing, but
this technique can be used on many different shapes of
reflectors, as long as there is adequate clearance
between the bulb and glass. Large 1000w MH bulbs may not
fit inside glass-enclosed reflectors]
2. That is all u need: Pliers,
Sidecutter, "Philips" screwdriver, 5mm bit for making
holes in reflector, 4 bolts, 4 "L" shaped brackets, a
ruler, electric drill and isolating band (rubber/elastic
tape). Note the bolts and "L" shaped brackets that I
3. Now, to make this done u will need a
peace of glass. Take the ruler and measure the size of
glass u will need. Hardware stores, windows shops, etc
will cut any type of glass you want. Bring your
measurements. I used regular, 1/8 (3 mm) window glass.
Here is the peace they cut for me using sizes I gave
[Editor's note: most window/glass stores
can make fabricate/cut tempered glass (high heat
resistance, thin & light, but high cost), or regular
plate glass (lower cost).
Tempered glass is
preferrable for high wattage lamps, as their heat is
extreme. Plate glass can crack under these hot
4. Take the electric drill and drill 4
holes in each corner of the reflector. To make this, I
used a 5mm bit.
5. Take the isolating band and
cut it with scissors in half......I doing this because
the width of the iso-band is more wider than the "L"
shaped bracket. Now ,take that half cut iso-band and
just roll over the "L" shaped bracket. That way, the
glass will sit on a soft surface instead of a metal
surface - protecting it against scratches, vibrations
and slip over...
6. Take the bolts & brackets and
screw them all together to the reflector......
Then, flip over the reflector and slide the
peace of glass into it.
Here u can see how it
will look with the glass sitting on the brackets and
just below the bulb......I kept 1.5 inch (4 cm) between
the glass and bulb.
7. After all dirty work is done, the
final product looks gorgeous and will do the job it was
intended to do......
With all stuff prepared
before doing the job ,yuo can finish all this in about
an hour ....